Product description Keychron K4 Max QMK Mechanical Keyboard Wireless The K4 Max features a 96% layout with advanced acoustic foams, Keychron Super switches, and tri-mode connectivity via Bluetooth 5.1, 2.4 GHz, and wired options. QMK Firmware with Launcher Web App Customize with QMK firmware and the Keychron Launcher for key remapping, macros, and shortcuts. The web-based Keychron Launcher requires no installation and stays up-to-date with the latest features. Wireless and Wired Modes Switch between devices seamlessly. Connect up to three devices via Bluetooth 5.1, or enjoy high-speed, low-latency performance with 2.4 GHz and wired connections.
An Epic Core Inside An ARM MCU with 256KB Flash provides flexibility for developers, while the onboard memory ensures your settings are saved directly on the keyboard. MacOS and Windows Compatibility With native Mac multimedia keys and extra keycaps for Windows, toggle easily between operating systems for a seamless multi-device typing experience. Specs Dimension 391.29 mm x 140.27 mm ( 15.40 x 5.52 inches) Weight 1290g / 2.84 lbs Angle 3°, 7° and 10° Body Material ABS Polling Rate 1000 Hz ( 2.4 GHz and wired) / 90 Hz (Bluetooth mode) Battery 4000 mAh rechargeable li-polymer battery Compatible System Windows/macOS/Linux N-Key Rollover (NKRO) Yes for both wireless and wired modes Keycaps Double-shot PBT keycaps, not shine-through, OSA Profile (OEM height, SA shape) Switches Keychron Super mechanical Backlight South-facing White LED Stabilizer Screw-in PCB stabs Wireless Working Time Around 100 hours (Lowest brightness) MCU ARM Cortex-M4 32-bit STM32F402 (256KB Flash) Connection 2.4 GHz / Bluetooth / Type-C wired Operating Environment -10 to 50