Keychron K2 Max keyboard Universal USB + RF Wireless + Bluetooth Black, Grey

Hot-swap: Yes
Product colour: Black, Grey
Material: Acrylonitrile butadiene styrene (ABS), Aluminium
Keyboard style: Straight
Backlight: Yes
Backlight type: RGB LED
Backlight colour: Multicolour
Adjustable keyboard height: Yes
Ergonomic design: Yes
Adjustable backlight: Yes
Power source type: Battery
Battery life (max): 190 h
Keyboard battery type: Built-in battery
USB Type-C charging port: Yes
Operating temperature (T-T): -10 - 50 °C
Keyboard weight: 940 g
Keyboard dimensions (WxDxH): 311.54 x 121.54 x 41.54 mm
Windows operating systems supported: Yes
Mac operating systems supported: Yes
Linux operating systems supported: Yes
Number of products included: 1 pc(s)
AC adapter included: No
Receiver included: Yes
Wireless receiver interface: USB Type-A
Mouse included: No
Battery technology: Lithium Polymer (LiPo)
Battery capacity: 4000 mAh
Multimedia keys: Yes
Pointing device: No
Keyboard keys operating life: 50 million characters
Polling rate: 1000 Hz, 90
Device interface: USB + RF Wireless + Bluetooth
Keyboard form factor: 75%
Recommended usage: Universal
Rollover: N-key rollover
Connectivity technology: Wired & Wireless
Frequency band: 2.4 GHz
Numeric keypad: No
Keyboard key switch: Mechanical
Key travel distance: 4.4 mm
Keyboard number of keys: 84
Keycaps material: Polybutylene terephthalate (PBT)
Built-in memory capacity: 256 KB
Multi-device support: Yes
Number of hot keys: 12
Physical layout: ANSI
Keycaps: Double shot
Programmable hot keys: Yes
Built-in memory: Yes
Bluetooth version: 5.1