Keychron J9 QMK Wireless Mechanical Keyboard - Grey (KBKCJ9MH4)

Switches

 Keychron Milk POM Switch - Banana

Backlight

South-facing RGB LED

Number of Multimedia Keys

12

Frame Material

ABS+PC frame

Keycap Material

Low-profile double-shot PBT keycaps, not shine-through

Back Plate Material

Aluminum Alloy

Layout

ANSI

Polling Rate (2.4 GHz and Wired Mode)

1000Hz

Polling Rate (BT Mode)

90Hz

N-Key Rollover (NKRO)

Yes for both wireless and wired modes

Backlit

22 types of RGB backlight options plus endless possibilities

Battery

2000 mAh rechargeable li-polymer battery

Wireless Working Time (Backlit off)

Up to 160 hours (Lab test result may vary by actual use)

Wireless Working Time (RGB)

Up to 83 hours (Lowest brightness)

Connection

2.4 GHz / Bluetooth / Type-C wired

Bluetooth version

5.2

Bluetooth Device Name

Keychron J9

Compatible System

macOS/Windows/Linux

Dimension

315.2 x 132.7 mm (12.41 x 5.23")

Weight

606 g / 1.34 lbs

Height without keycap (front)

14.5 mm (0.57")

Height without keycap (rear)

21.44 mm (0.84")

Height incl. keycap (front)

20.3 mm (0.80")

Height incl. keycap (rear)

25.65 mm (1.01")

Typing Angle

3º, 4.º and 7º

MCU

Low-power ARM Cortex-M3 32-bit WB32F3G71 (256KB Flash)

Operating Environment

-10 to 50℃

Note

*The J9 is currently compatible with Keychron low-profile mechanical switches only, as QMK does NOT support low-profile optical switches.