LG - UltraWide 34" WQHD 144Hz Curved Monitor FreeSync Premium HDR10 (HDMI, DisplayPort, USB-C) - Black
About this product
The 34U640B-B LG UltraWide monitor is built to elevate productivity, creativity, and everyday comfort. Its expansive 34" 21:9 UltraWide WQHD (3440×1440) display gives you more room to multitask across multiple windows—reducing clutter and helping you stay focused. A subtle 1800R curve and slim, virtually borderless design create a more natural, distraction-free workspace. A 144Hz refresh rate¹ and 5ms response time keep visuals smooth and clear for video calls, streaming, and gaming. AMD FreeSync Premium reduces tearing and stutter for controlled responsive motion. With up to 99% sRGB coverage and HDR10 support, content appears vibrant and consistent across documents, media, and HDR visuals. Simplify your setup with USB-C connectivity, delivering display, data, and up to 65W laptop charging through a single cable. HDMI, DisplayPort, and dual USB ports make it easy to connect multiple devices while keeping your desk clean and organized. Control two PCs with one monitor, keyboard, and mouse, and move files between systems with simple drag-and-drop—no extra hardware required. The Switch app² enhances productivity by letting you split the screen into up to six sections, customize layouts, or launch video calls instantly with a hotkey. Reader Mode reduces blue light with warmer tones for easier reading and browsing. The slim stand saves desk space, while height and tilt adjustment help you find a comfortable viewing position. One-click mounting makes setup quick and effortless.
Highlights
Features
Widescreen Workflows Made Effortless
Upgrade your desktop setup with a curved 34" 21:9 UltraWide WQHD display that lets you see more at once. Enjoy smooth 144Hz1 visuals, vibrant HDR color, and a sleek, narrow-bezel design—perfect for on-screen multitasking, creativity, and everyday comfort.
Curved 21:9 UltraWide WQHD Display
The 21:9 UltraWide WQHD (3440×1440) display gives you room to work across multiple apps at once—reducing window switching and improving focus. The subtle 1800R curve follows your natural line of sight for comfortable long sessions, while the sleek design keeps your workspace open, clean, and distraction-free.
Up to 99% sRGB Color Coverage
Up to 99% sRGB coverage and HDR10 support deliver balanced color and smooth tonal transitions across documents, media, and HDR content.
USB Type-C: All-in-One Connectivity
USB-C connectivity simplifies your setup by handling display, data, and up to 65W laptop charging through a single cable. With DisplayPort and HDMI and two USB ports also on board, it’s easy to connect laptops and peripherals for a cleaner desk and smoother workflows.
Dual Controller (KVM Switch)
Control two PCs with a single monitor, keyboard, and mouse. Easily switch between devices and move files between systems with simple drag-and-drop—streamlining your setup and reducing desk clutter without extra hardware.
Customize Your Screen View with the Switch App
The Switch app transforms your screen into a multitasking hub for work, gaming, and streaming. Effortlessly split the screen into up to 6 sections, customize display layouts, or launch video calls with a single hotkey.
AMD FreeSync Premium Technology
Powered by AMD FreeSync Premium certification, this monitor delivers tear-free, ultra-smooth visuals with low latency—so fast motion stays controlled, responsive, and visually precise during gameplay.
144Hz Keeps Motion Super Smooth
With a 144Hz refresh rate and 5ms response time, this UltraWide keeps visuals smooth and clear. Perfect for video calls, streaming, and gaming.
Reader Mode Brings Comfort to Reading
Reader Mode reduces blue light displaying warmer hues and tones ideal for reading documents or browsing for extended periods.
Space-Saving Stand with Adjustable Screen
UltraWide's slim stand with a square base helps keep your workspace clean and organized while saving valuable desk space. The 3-side virtually borderless screen with tilt and height adjustability makes it easy to dial in a comfortable viewing position, and one-click mounting allows for quick, and easy setup.
Specifications
- Refresh Rate144HzMaximum Resolution3440 x 1440Response Time5 millisecondsPanel TypeVASynchronization TechnologyFreeSync Premium Pro (AMD Adaptive Sync), Not Applicable
Reviews
Rating 4.8 out of 5 stars with 4 reviews
The vast majority of our reviews come from verified purchases. Reviews from customers may include My Best Buy members, employees, and Tech Insider Network members (as tagged). Select reviewers may receive discounted products, promotional considerations or entries into drawings for honest, helpful reviews.
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The 34U640B-B LG UltraWide monitor is built to elevate productivity, creativity, and everyday comfort. Its expansive 34" 21:9 UltraWide WQHD (3440×1440) display gives you more room to multitask across multiple windows—reducing clutter and helping you stay focused. A subtle 1800R curve and slim, virtually borderless design create a more natural, distraction-free workspace. A 144Hz refresh rate¹ and 5ms response time keep visuals smooth and clear for video calls, streaming, and gaming. AMD FreeSync Premium reduces tearing and stutter for controlled responsive motion. With up to 99% sRGB coverage and HDR10 support, content appears vibrant and consistent across documents, media, and HDR visuals. Simplify your setup with USB-C connectivity, delivering display, data, and up to 65W laptop charging through a single cable. HDMI, DisplayPort, and dual USB ports make it easy to connect multiple devices while keeping your desk clean and organized. Control two PCs with one monitor, keyboard, and mouse, and move files between systems with simple drag-and-drop—no extra hardware required. The Switch app² enhances productivity by letting you split the screen into up to six sections, customize layouts, or launch video calls instantly with a hotkey. Reader Mode reduces blue light with warmer tones for easier reading and browsing. The slim stand saves desk space, while height and tilt adjustment help you find a comfortable viewing position. One-click mounting makes setup quick and effortless.
One screen. Endless possibilities. The 21:9 ultra-wide 34” curved Smart monitor offers stunning widescreen visuals and a sleek design that's perfect for work, play, cinematic viewing, and everything in between. Experience vivid color with up to sRGB 99% coverage, HDR10 support and impeccable clarity with the 21:9 WQHD (3440x1440) screen, bringing every detail to life. Thanks to LG’s streaming platform webOS23¹, find your favorites fast with built-in access to Netflix, Prime Video, the Apple TV app, Disney+, HBO Max and instant access to over 300+ free LG Channels with everything from comedy to movies to sports. Apple AirPlay 2 & HomeKit compatibility² allow you to wirelessly control your monitor plus cast and mirror content from iOS or MacOS devices, no Apple TV necessary. Gaming on the monitor’s wide screen with the 100Hz refresh rate assures ultra-smooth action.
Acer's Nitro ED340CUR 34" curved panel monitor with Ultra Wide QHD resolution delivers the incredible. Through AMD FreeSync Premium technology, the game’s frame rate is determined by your graphics card, not the fixed refresh rate of the monitor, giving you a serious competitive edge. Smooth, tear-free gameplay!! Crisp, true-to-life colors come alive with the amazing 3440 x 1440 resolution, allowing you to enjoy High-Definition entertainment in the comfort of your home. The wide view angle technology lets you share what's on your screen with friends and family as colors stay true no matter what angle you're viewing from. Incredible 100,000,000:1 contrast ratio and rapid response time ensure your games, work and movies are smooth and look as epic as possible.
AOC CU34G4HV 34” Curved Ultrawide Gaming Monitor with WQHD 3440 x 1440 resolution delivers expansive visuals and ultra-smooth gameplay, featuring a 1500R curved VA panel, HDR10 visual enhancement, and up to 200Hz refresh rate with 0.5ms response time for fast-paced action. The 21:9 ultrawide aspect ratio and VA Wide View provide immersive viewing with consistent image quality across wide angles. In addition, this monitor includes height adjustment and VESA mount compatibility for ergonomic comfort, along with 2 HDMI 1.4 and 1 DisplayPort 1.4 inputs plus an earphone port for flexible connectivity.
| Pros for LG - UltraWide 34" WQHD 144Hz Curved Monitor FreeSync Premium HDR10 (HDMI, DisplayPort, USB-C) - Black | |||
|---|---|---|---|
| There were no pros for this product— | Screen Size, Overall Performance, Resolution, Refresh Rate, Smart Features | Overall Performance, Screen Size, Refresh Rate, Immersion | Overall Performance, Screen Size, Refresh Rate, Resolution, Ergonomics |
| Cons for LG - UltraWide 34" WQHD 144Hz Curved Monitor FreeSync Premium HDR10 (HDMI, DisplayPort, USB-C) - Black | |||
| There were no cons for this product— | Connectivity, Controls | There were no cons for this product— | Audio Output |
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