10-Point Projected Capacitive TouchTouch screens with projected capacitive touch can recognize up to 10 points of simultaneous contact, allowing for a highly accurate and ultra-responsive touch experience. With smooth and responsive touch capabilities, this touch display is ideal for home entertainment, office work, education, and commercial use.10-point Multi-touchAdvanced ergonomic stand designA stable, integrated bookstand design makes it easy to adjust the angle of this display for a better user experience. The display can tilt or lay completely flat on a tabletop for a more comfortable work environment.Ergonomic standVersatile ConnectivityHDMI and VGA inputs give you the freedom to connect your monitor to a variety of devices.Cross-platform compatibilityCross compatibility with a wide range of operating systems including Windows 10 and certain Linux versions.Supports Windows 7/8/10, Linux Kernel 4.X/3.XWindows 10, LinuxDurable, Scratch-resistant ScreenThis touch display is equipped with a durable, protective glass faceplate, resulting in increased durability with scratch protection; as well as a consistent, high-quality touch experience in high-traffic areas like public spaces where the touch display can be used as a kiosk.7H HardnessDual integrated speakersDesigned with dual integrated speakers, this monitor combines incredible screen performance with stereo sound for an immersive multimedia experience.Dual integrated speakersEnhanced Viewing ComfortFlicker-Free technology and a Blue Light Filter help to eliminate eye strain from extended viewing periods.Blue light filter Flicker FreeVESA-compatible mountConveniently mount the monitor to your liking by utilizing VESA compatible mount design.

Extraordinary Wide-Angle VisionEnjoy vivid colors with consistent brightness and amazing accuracy no matter the vantage point. SuperClear® IPS monitor features ultra-wide 178-degree vertical and horizontal viewing angles that deliver the same image quality with true color accuracy and consistency from screen to print.Full HD 1080pFull HD 1920x1080 resolution creates unbelievably clear pixel-by-pixel image performance. Experience mind-blowing clarity and detail while working, gaming, or enjoying the latest show premiere.Variable Refresh Rate Delivers Smooth, Continuous VisualsVariable Refresh Rate technology eliminates screen tearing and choppy frame rates for smooth and seamless visuals in every scene.Smooth Visuals With 100Hz Refresh RateWith a fast 100Hz screen refresh rate, you can experience a truly fluid visual display. This results in improved viewing clarity, reduced screen stutter during fast-moving action scenes, and benefits work-related tasks, reducing eye strain and increasing productivity.Industrial Colour StandardA 99% sRGB panel colour coverage capability reproduces richer and more vivid colours, ensuring that images align perfectly with industry colour standards.Connection FlexibilityHDMI, VGA, and DisplayPort(DP) inputs give you the freedom to connect your monitor to a wide range of devices.A New Angle on Workplace ErgonomicsEnjoy every detail with advanced ergonomics – swivel, pivot, height adjustment, and a -3.5°~28° ergonomic tilt angle. Each provides a greater range of customizable adjustments for maximum comfort. The full ergonomic design also enables you to use the monitor while standing or having a strategic group discussion around the screen.Eye ProTech+ for Always-on Eye ProtectionWork comfortably over extended periods with ViewSonic Eye ProTech+. Combining Flicker-Free technology with a built-in low blue light screen, this monitor helps maintain fresh-feeling eyes and prevent digital eye fatigue at all times without compromising image quality.Low Energy ConsumptionDesigned with energy efficiency in mind, ViewSonic’s Eco Mode successfully reduces carbon footprint and significantly lowers office overhead costs.

The ViewSonic® TD2423 is a 24” IR touch display designed for intuitive multi-touch use. Infrared (IR) touchscreen can detect up to 10 points of contact compared to optical touchscreens and can be operated by a stylus, fingers and gloved hands. The multi-touch input is more accurate, and the display is faster. Coupled with an adjustable tilt, you can easily interact with the TD2423 at an ideal position. This monitor features Full HD resolution to give you clear images and is built with scratch-resistant 7H hardness screen to surface damage. To support your work, the TD2423 is equipped with VGA, HDMI, DVI and USB connectivity.Intuitive Multi-touch ExperienceAn infrared touchscreen that can detect up to 10 points of contact under Windows compared to optical touchscreens. The TD2423 delivers an intuitive multi-touch experience with every tap, pinch, and swipe with the finger touch, gloved touch, and stylus inputs.Operating System SupportThis monitor supports the main operating systems being Windows, macOS, Android, Chrome OS, Linux and Raspberry Pi.Simple and Safer Way to InteractThis monitor can be operated by stylus* and gloved hands, which improves hygiene and is effective for selection, dragging and drawing. What’s more, there is a magnetic pen placeholder on the base.Anti-scratch TouchscreenWith a built-in 7H hardness screen, it’s resistant to surface damage caused by sharp objects.7H Hardness ScreenAdjustable TiltThis monitor includes an adjustable tilt, which allows you to easily tilt back up to 40-degrees, making it a good fit for anyone.Clear ImagesThis monitor features Full HD 1920x1080 resolution to benefit you with greater image details and more displayable on-screen contents.Full HD 1080p ResolutionDual Integrated SpeakersWith built-in 2-watt speakers, this monitor provides you a better audiovisual experience.Enhanced Viewing ComfortThis monitor is built with Flicker-Free technology and a Blue Light Filter to reduce eye fatigue after a long day of use.

DOMINATE WITH DUAL MODEStop settling, start dominating with the XG275D1-4K's dual-mode feature. Crank it up to breathtaking 4K UHD at 160 Hz for visuals so sharp they’ll leave you in awe, or shift gears to FHD at a blistering 320 Hz for buttery-smooth responsiveness that puts victory within your grasp.​DIAL IN VICTORYTailor your gaming experience with the XG275D1-4K’s versatile aspect ratios—4:3, 5:4, 16:9, and 16:10—crafted to dominate any genre or playstyle. When the stakes are high, switch to the 24.5-inch Esports setting, scaling down the display for razor-sharp focus and lightning-fast reactions in competitive play.LIGHT UP THE ACTION WITH FAST IPSRule the game with stunning clarity, brought to life by the Fast IPS panel. With exceptional color accuracy and radiant brightness, it pulls you into the heart of every scene. Combined with wide viewing angles, the action remains flawless from every perspective, ensuring the best seat is always yours.BEAT LAG WITH 0.5MS RESPONSE TIMEDecimate your rivals with pinpoint precision, powered by the blazing-fast 0.5ms (MPRT) response time. It ensures fluid pixel transitions and vibrant colors, rendering even the fastest action on the battlefield in stunning clarity with minimal ghosting.STAY COMFOTABLE, STAY IN THE GAMECrush marathon gaming sessions or conquer workdays in total comfort with a tilt, swivel, and height-adjustable design that moves with you—keeping you locked in for peak performanceand endless immersion.ILLUMINATE YOUR VICTORYLevel up your gaming setup with stunning RGB lighting that breathes life into every session. Choose from an expansive palette of colors and dynamic effects to create the ideal atmosphere, perfectly tuned for the chaos of intense battles or the serenity of immersive open worlds.LEVEL UP YOUR CONSOLE EXPERIENCEEngineered for flawless PS5 and Xbox compatibility, the XG275D1-4K captivates with breathtaking visuals and responsive gameplay. Dive into vivid worlds, feel the intensity of every explosion, and execute every action with rapid precision,no matter your console of choice.Visit the link for detailed instructions on enabling 120Hz video output from your PS5 or Xbox Series X/S to the ViewSonic monitor.Check this link for the compatibility list of PS5 and Xbox Series X/S.PLUG-IN TO GLORYSwitch between PCs and consoles on the fly with dual HDMI 2.1 ports, a DisplayPort 1.4 input, and a USB-C port, all delivering jaw-dropping refresh rates. With seamless multi-device connectivity, your gaming setup stays streamlined, so you can dive into the best of both worlds without missing a beat.

OVERVIEWGet ready to game on the VX2719-PC-MHD 27” Full HD display. Take your experience further with the immersive 1500R curve, which puts your gameplay in focus. The ultra-responsive 240Hz display provides pro level refresh rates so you can stay ahead of the competition ad enjoy ultra-smooth gaming no matter how intense the action gets. A clean design, with 3-side borderless display and sleek dimensions create a product that delivers all you need. Adaptive™ Sync virtually eliminates screen tearing and stuttering for a fluid gaming experience. And the 1ms MPRT response time enables you to react in-game with complete precision. VX2719-PC-MHD is also equipped with ViewSonic’s exclusive ViewMode™ presets, which offer optimized screen performance for a variety of needs, such gaming, editing, or watching movies. In addition, a DisplayPort and HDMI inputs offer flexible connectivity for gaming and entertainment.Seamless GameplayVX2719-PC-MHD features an ultrafast 240Hz refresh rate that delivers esports level experiences. Lag and motion blur are virtually eliminated providing incredibly smooth visuals. Whether first-person shooters, racing or real-time strategy, your gaming and PC experience is upgraded with fluid motion and flawless graphics.Ultimate ImmersionImmerse yourself further into the action with a 27” curved screen. The deeper 1500R curvature strikes the perfect balance of comfort and immersion.React InstantlyUltrafast 1ms (MPRT) response time deliver smooth visuals and minimizes motion blur and ghosting. When you are deep in the action, you’ll be glad your monitor reacts as quickly as you do, helping to claim more victories.Prevent Screen TearingExperience fluid graphics across all your games with Adaptive™ Sync. By synchronizing your monitor refresh rate with your GPU output, Adaptive™ Sync works to enable smooth gameplay by eliminating stutter, input lag and image tearing.Render Every DetailExperience every detail of your game with an expansive 27”, Full HD display. The high-definition display showcases all the action, and all the glory, with incredible detail.Wide Angle SuperClear® TechnologySee the action from every angle with SuperClear® technology. This monitor delivers the same image quality no matter the angle.Mega Dynamic ContrastA mega dynamic contrast ratio of 80M:1 creates depth in images by adding more definition to the darkest and brightest colors on the screen to ensure images are shown with the finest details.User-Customized Game ModeViewSonic’s exclusive ViewMode™ offers specialized presets to fit different usage scenarios. These presets enhance gamma curve, color temperature, contrast, and brightness to deliver the optimal viewing characteristics for each application. The Game Mode integrates pre-calibrated FPS, RTS and MOBA game settings with in-game testing and adjustments for the best blend of color and technology.Dual Integrated SpeakersThe monitor accents its incredible screen performance with dual, 2-watt speakers. Incredible stereo sound to complete your gaming experience.Viewing ComfortFlicker-Free technology and a Blue Light Filter help reduce eye strain and fatigue from extended screen time during a gaming marathon.

VX3276-4K-mhd - 32" Display, MVA Panel, 3840 x 2160 ResolutionThe ViewSonic VX3276-4K-mhd is a sleek 32” (31.5" viewable) 4K UHD monitor with a modern and minimalist style perfect for home use. With SuperClear MVA panel technology and 80M:1 dynamic contrast ratio, this monitor offers best-in-class screen performance with ultra-wide viewing angles. A sleek edge-to-edge frameless design, combined with stunning 3840 x 2560 resolution, provides incredibly sharp and detailed visuals, while HDR10 content support delivers a high dynamic range of vivid color and contrast for incredible screen performance. Versatile HDMI, DisplayPort, and Mini DisplayPort inputs offer flexible connectivity options for both computing and gaming, while an exclusive ViewMode feature provides intuitive presets for optimized screen performance in different applications.STUNNING 4K ULTRA HD RESOLUTIONDisplaying more than 8 million pixels with a high pixel density, this Ultra HD 3840x2160 monitor delivers the ultimate in image detail and clarity for stunning, lifelike images. In addition, with 4x more pixels than Full HD resolution, this Ultra HD monitor displays more content to maximize productivity.ULTRA-SLIM PANEL WITH FRAMELESS DESIGNFeaturing an incredibly thin panel, a unique desktop stand, and a frameless edge-to-edge screen, this monitor delivers an immersive viewing experience and near-seamless setup for multi-monitor configurations. With its sleek, modern design, this elegant monitor looks as good as it performs.SUPERCLEAR MVA PANEL TECHNOLOGYEnjoy accurate and vivid colors with consistent levels of brightness no matter the vantage point. With SuperClear MVA panel technology, this monitor delivers the same image quality whether you are looking at the screen from above, below, the front, or the side.HDR10 CONTENT SUPPORTWith the ability to decode HDR10 video signals, this monitor delivers incredibly detailed video playback. Colors are brighter and more vivid, and contrast is richer and more detailed. With such amazing image reproduction, this monitor displays videos as they were intended to be seen – giving you a fuller, more immersive viewing experience.VERSATILE CONNECTIVITYHDMI, DisplayPort, and Mini DisplayPort inputs give you the freedom to connect your display to a variety of devices.OPTIMIZED VIEW SETTINGSViewSonic’s unique ViewMode feature offers “Game,” “Movie,” “Web,” “Text,” and “Mono” presets. These presets enhance gamma curve, color temperature, contrast, and brightness to deliver an optimized viewing experience for different screen applications.ENHANCED VIEWING COMFORTFlicker-Free technology and a Blue Light Filter help to eliminate eye strain from extended viewing periods.DUAL INTEGRATED SPEAKERSDesigned with dual integrated speakers, this monitor combines incredible screen performance with stereo sound for an immersive multimedia experience.

The ViewSonic VX3218C-2K features a 32” QHD display with a 1500R curve for bigger, more immersive gameplay. The hyper-responsive 165Hz refresh rate renders your games with ultra-smooth graphics. A clean design removes the bulk of larger monitors, and a borderless display with sleek dimensions enhances this big screen experience. AMD FreeSync™ Premium prevents screen tearing and stuttering for fluid gameplay and the 1ms MPRT response time enables you to react in-game with speed and precision. The VX3218C-2K is also equipped with ViewSonic’s exclusive ViewMode™ presets, which offer optimized screen performance for a variety of needs, such gaming, editing, or watching movies. In addition, a DisplayPort and HDMI inputs offer flexible connectivity for gaming and entertainment.Ultimate ImmersionThe 32” 1500R display is perfect for losing yourself in your favorite games. The curved screen allows for more comfort, and deeper immersion.Seamless GameplayNo matter your favorite game, whether a first-person shooter, racing and real-time strategy, the hyper-responsive 165Hz refresh rate virtually eliminates lag and motion blur. So you can enjoy smooth gameplay and flawless graphics.React InstantlyEvery millisecond is crucial, and the fast 1ms (MPRT) response time minimizes blur and ghosting, helping you claim more victories in game.Prevent Screen TearingWith AMD FreeSync™ technology, the monitor is able to adapt so that there is less fluctuation and jumpiness in the image.Worlds with ColorEnhance your content with HDR10. See every rendered detail across game environments with rich color, deep contrasts and clear highlights and shadows.Brace for true darkness​See and move fluidly in the shadows with ViewSonic’s Black Stabilization feature. When enabled, the darkest scenes are lit up for enhanced visibility so you can spot the finer details and stay ahead of the pack.​Mega Dynamic ContrastA mega dynamic contrast ratio of 80M:1 creates depth in images by adding more definition to the darkest and brightest colors on the screen to ensure images are shown with the finest details.Viewing ComfortFlicker-Free technology and a Blue Light Filter help reduce eye strain and fatigue from extended screen time during a gaming marathon.User-Customized Game ModeViewSonic’s exclusive ViewMode™ offers specialized presets to fit different usage scenarios. These presets deliver the optimal viewing characteristics for each scenario. The Game Mode integrates pre-calibrated FPS, RTS and MOBA game settings with in-game testing and adjustments for the best blend of color and technology.Low Energy ConsumptionViewSonic’s energy efficient Eco-Mode adjusts brightness to the optimal setting to reduce power consumption and eye fatigue while also prolonging the monitor’s lifespan.Dual Integrated SpeakersThe monitor accents its incredible screen performance with stereo sound to complete your gaming experience.

The ViewSonic VX2779J-HD-PRO is a versatile 27-inch Full HD monitor designed to elevate your visual experience, whether you're working or gaming. With a high 180Hz refresh rate and lightning-fast 1ms MPRT response time, this monitor ensures smooth visuals and minimal input lag – ideal for gamers seeking a competitive advantage. Equipped with SuperClear® IPS technology, it boasts wide viewing angles and breathtaking visuals, perfect for immersive gaming sessions, creative endeavors, and efficient office work. Beyond performance, the monitor's sleek design elevates your workspace aesthetics, combining form and function for a complete package.GLARE-FREE GAMING WITH SUPERCLEAR® IPSExperience captivating visuals with the VX2779J-HD-PRO monitor. Featuring SuperClear® IPS panel technology, it ensures vibrant, true-to-life colors from every viewing angle. Whether you're immersed in intense multiplayer gaming or enjoying your favorite videos, this monitor breathes life into every detail.MAXIMIZE EVERY MOVEWith its hyper-responsive 180Hz refresh rate, the VX2779J-HD-PRO provides seamless gaming and video editing experience. Its smooth and immersive visuals lend themselves to precise aiming, allowing you to dominate in competitive gaming sessions. When every frame counts, this monitor ensures you don't miss a beat.WITNESS GHOST-FREE CLARITYBoasting a remarkable 1ms (MPRT) response time, the VX2779J-HD-PRO gaming monitor provides gamers with a competitive edge, enabling smooth pixel transitions between colors to deliver sharp, immersive visuals with minimal ghosting.GOODBYE TO SCREEN TEARINGSupercharge your gaming experience with the VX2779J-HD-PRO monitor, boasting AMD FreeSync™. Say goodbye to display stutter and screen tearing – this monitor ensures your immersion in lightning-fast action and razor-sharp visuals, even during heart-pounding, fast-paced games.UNLOCK VIVID VISUALSHDR10 takes image clarity to a whole new level, delivering enhanced dynamic range. Explore otherworldly realms, browse holiday shots, or indulge inaction-packed movies brought to life with deeper contrast, richer colors, and crisper details.SAFEGUARD YOUR EYES WITH Eye ProTechPowered by flicker-free and blue light filter technologies, EyeProTech alleviates digital eye strain by eliminating screen flicker and minimizing harmful blue light emissions- perfect for those intense gaming marathons.EXPANDED CONNECTIVITYExperience expanded connectivity with the VX2779J-HD-PRO, equipped with two HDMI 1.4 ports and one DisplayPort 1.4 input, all capable of delivering astonishing refresh rates. Simultaneously connect both PCs and consoles and seamlessly switch between the two, to enjoy the best of both gaming worlds within a streamlined setup.WHERE STYLE MEETS ERGONOMICSeamlessly blending stylish aesthetics with ergonomic excellence, the VX2779J-HD-PRO monitor ensures your play and work sessions are nothing short of comfortable. Effortlessly tilt, swivel, rotate, and adjust the monitor's height to achieve the perfect viewing angle.NO CONSOLE LEFT BEHINDMeticulously crafted for flawless compatibility with both PS5 and Xbox, the VX2779J-HD-PRO captivates with breathtaking visuals and responsive gameplay. Immerse in vibrant worlds, sense the power of every explosion, and execute every action with swift precision, no matter your console of choice.

Designed to boost productivity and maximize output, the ViewSonic® VG2756-4K is a 27” 4K Ultra HD docking monitor that transforms your desktop into a streamlined and efficient workspace. Enjoy reliable and flexible network connectivity with the integrated gigabit Ethernet port, while the latest USB Type-C connectivity makes setup a breeze. That’s not all, the integrated USB hub also provides single-cable simplicity for connecting and charging your peripherals and accessories. A best-in-class ergonomic design features 40-degree tilt and bi-directional pivot so your screen and workspace are as comfortable as you need. In addition, the included vDisplay software gives you quick and easy OSD control, as well as customized screen templates for easy multi-tasking. This monitor is also shipped in eco-friendly biodegradable packaging, along with an easy-to-install quick release stand that makes for quick deployment and a lower total cost of ownership.BE MORE PRODUCTIVE WITH VIEWSONIC DOCKING MONITORSEnjoy safety, flexibility and productivity with ViewSonic. ViewSonic offers a diverse range of display solutions to help companies make the most out of their flexible workstations.Featuring state-of-the art ergonomic design, ViewSonic® docking monitors are the perfect setup for your changing work environment. With USB-C single-cable connectivity, RJ45 wired Ethernet connection and a USB hub for your accessories, there’s no need for expensive docks. One cable provides everything you need to connect and start working.Enjoy peace of mind with an industry-leading warranty on all ViewSonic monitors and access to an award-winning customer support team.REDUCE CLUTTER WITH SINGLE-CABLE SOLUTIONWith a slim and reversible connector and easy single-cable docking, USB 3.2 Type-C connectivity reduces the reliance on multiple wires, cables, and adapters. In addition to fast data, audio, and video transfer, USB Type-C also provides quick 90W charging over a single cable.A MORE COMFORTABLE WORKSPACEWith advanced ergonomic features including swivel, pivot, height adjust, and tilt, this monitor is designed to provide a greater range of adjustment for increased productivity and comfort. The monitor can tilt up to 40-degrees, making it ideal for use during group discussions and screen sharing.COMMAND AND CONTROL MADE EASYIntegrated vDisplayManager software enhances productivity by putting the On-Screen Display (OSD) menu controls on your monitor’s screen. This delivers a more comfortable viewing experience by allowing you to quickly and easily adjust display settings such as volume, brightness, contrast, and more.MINIMIZED TOTAL COST OF OWNERSHIPDesigned for the busiest of office environments, this monitor helps to reduce hidden business costs and delivers an efficient end-to-end enterprise experience. From installation time and recycling concerns, to user experience and screen performance, every feature of this monitor was carefully considered to not only meet your workspace demands, but to also reduce your TCO.STUNNING 4K ULTRA HD RESOLUTIONDisplaying more than 8 million pixels with a high pixel density, this Ultra HD 3840x2160 monitor delivers the ultimate in image detail and clarity for stunning, lifelike images. In addition, with 4x more pixels than Full HD resolution, this Ultra HD monitor displays more content to maximize productivity.SUPERCLEAR IPS PANEL TECHNOLOGYEnjoy accurate and vivid colors with consistent levels of brightness no matter the vantage point. With SuperClear IPS panel technology, this monitor delivers the same image quality whether you are looking at the screen from above, below, the front, or the side.ENERGY STAR CERTIFICATIONThis is an ENERGY STAR certified product that can save on energy costs* while reducing greenhouse gases.*Energy savings may vary based on actual usage and other factors.EPEAT CERTIFIEDWith EPEAT Certification, this monitor delivers a reduced environmental impact over the complete product lifecycle, making it a great eco-friendly, long-term investment.

The ViewSonic VA1655 is a portable 16” Full HD monitor perfect for overcoming one-screen limitations outside the office. Extend the screen from phones, tablets, or laptops for mobile work, one-on-one presentations, or leisure entertainment. The two universal USB Type C connectors provide a one-cable solution for audiovisual and power signal transmission. The adjustable stand and pivot-able display will support your working angles.Extend Your Content from Mobile DevicesNot only HDMI, you also can extend your screen anywhere with your built-in USB Type C laptop, tablet, or phone. It supports Windows, Android, Chrome, MacOS, iOS and iPadOS*. Be sure your laptop, tablet, or smartphone has a full-function USB-C connector that supports Display Port 1.2 Alt Mode and Power Delivery.*To connect on iPhone or iPad with a lightning port, you will require to purchase a Lightning Digital AV Adapter from apple.com and connect via a HDMI to mini HDMI cable**.**The HDMI to mini HDMI cable is included in the box.Anywhere with Laptops, Tablets, and PhonesAudiovisual Extension while Power ChargingBroadcast your built-in Type C mobile device’s multimedia onto a bigger screen and charge over one cable while powering from an external power bank/outlet over the other USB Type C cable.*Power Charging:1. For longer use, connect to an external power bank or outlet.2. For temporary use, connect to your mobile device only.1> Over 2 hours when powering from your phone - Tested with the phone's built-in battery at a capacity of 4,000 mAh.a. The phone is on, but with a blank screen.b. The portable monitor has a brightness value of 15 and a contrast value of 70.c. Connected by a USB Type C cable. 2> Over 1.5 hours when powering from your laptop - Tested with the laptop's built-in battery at a capacity of 53,546 mAh.a. The laptop is on; the screen is on.b. The portable monitor has a brightness value of 100 and a contrast value of 70.c. Connected by a USB Type C cable.Flexible Setup with USB Type C and mini HDMIPortable Size for Work & FunLarger, 16” display than most common laptops and weighing less than 1 kg with stylish sleeve case. It perfectly outfits your mobile workplace, and can be used for multimedia play when taking a break.Working in Your Preferred AnglesView in a wide range of angles by adjusting the attached stand.Up to 53 Degree TiltSupports Vertical LayoutBesides common horizontal content, you may setup a pivot screen for table-reviewing, programming, photo-editing, gaming, etc.Pivot-able DisplayOne-piece DesignWith the plastic case and endurable hinge, the foldable stand makes the whole monitor a one-piece design.Endurable hinge & Foldable stand