LG 34U640B-B 34-Inch UltraWide 21:9 QHD (3440 x 1440) Curved Professional Computer Monitor, 144Hz, FreeSync Premium, HDR10, HDMI, DisplayPort, USB Type-C PD 65W, Tilt/Height Adjustable Stand, Black

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 rate 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 app 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.
¹Actual refresh rates may vary depending on computer graphics specifications and configurations.
²Software installation required. Visit Support on LG.com to download.
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 144Hz 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.

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