Keychron K5 Max QMK/Via Ultra-Slim RGB Backlight Wireless Custom Mechanical Keyboard (Low Profile Gateron Mechanical Switch)

Keychron K5 Max is an ultra-slim wireless custom mechanical keyboard. It supports 2.4 GHz, Bluetooth, and a wired connection. It allows anyone to master any keys or macro commands on its 100% layout through Keychron Launcher web app. Besides, it has included LSA (low profile spherical-angled) profile keycaps for both Windows and macOS, and users can hot-swap with Gateron low-profile MX mechanical switch in a breeze (for RGB Backlight Hot-Swappable Version only).

Specification

Number of Keys: 108 (100%)
Switches: Gateron low-profile mechanical
Switch Face: North-facing
Number of Multimedia Keys: 12 
Frame Material: ABS+Aluminum frame
Keycap Material: Low-profile double-shot PBT
Layout: ANSI
Polling Rate (2.4GHz and Wired Mode): 1000Hz
Polling Rate (BT Mode): 90Hz
N-Key Rollover (NKRO): Yes for both wireless and wired modes

*The K5 Max is currently compatible with Gateron/Keychron low-profile mechanical switches only, as QMK does NOT support low-profile optical switches.

Connectivity and Power

Backlit: 22 types of RGB backlight options plus endless possibilities
Battery: 2000 mAh rechargeable li-polymer battery
Wireless Working Time (Backlit off): Around 95 hours (Lab test result may vary by actual use)
Wireless  Working Time (RGB): Around 50 hours (Lowest brightness)
Connection: 2.4 GHz / Bluetooth / Type-C wired
Bluetooth version: 5.1
Bluetooth Device Name: Keychron K5 Max
Compatible System: macOS / Windows / Linux

Physical Unit

Dimension: 424 mm x 119 mm (16.69 x 4.69")
Weight: 720g / 1.59 lbs
Height without keycap (front): 7.8 mm (0.3")
Height without keycap (rear): 14.7 mm (0.58")
Height incl. keycap (front): 18.2 mm (0.72")
Height incl. keycap (rear): 23.5 mm (0.92")
Typing Angle: 3.37º, 4.36º and 6.56º
MCU: ARM Cortex-M4 32-bit STM32F402 (256KB Flash)
Operating Environment: -10 to 50℃