Keychron K5 Max QMK/VIA Wireless Custom Mechanical Keyboard (US ANSI Keyboard) Red Switch

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 (Wired Mode): 1000Hz
Polling Rate (Wireless 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): Up to 110  hours (Lab test result may vary by actual use)
Wireless Working Time (RGB): Up to 70 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℃