Description

Expert Features

75% Compact Layout: 83-key ANSI layout keeps the arrow keys and function row in a desk-friendly footprint.
Keychron Super Brown Switches: This KJ2-H3 variant uses tactile mechanical switches for a noticeable bump while typing.
Hot-Swappable RGB Version: Change compatible 3-pin or 5-pin MX-style mechanical switches without soldering.
Three Connection Modes: Connect over 2.4 GHz wireless, Bluetooth 5.2, or USB-C wired.
Fast Gaming Polling: 1000 Hz polling in 2.4 GHz and wired modes; Bluetooth runs at 125 Hz.
Bluetooth for Three Devices: Pair with up to three devices and switch between them for your PC, phone, and tablet.
QMK and Keychron Launcher: Remap keys and set up macros or shortcuts through Keychron’s web-based configuration tool.
Last Key Priority: The LKP feature prioritizes the most recently pressed key to help with quick directional changes.
Customizable RGB Lighting: Choose from 22+ RGB settings, including static white, with per-key and mixed-zone lighting customization.
Double-Shot PBT Keycaps: Durable PBT keycaps resist oil and help keep the legends from fading.
Windows, macOS and Linux Support: A system toggle and Mac/Windows keycaps make it easy to switch setups.
Three Typing Angles: Select 4.5°, 6.4°, or 8.8° to suit your desk and typing preference.
4000 mAh Battery: Keychron rates battery life at around 300 hours with backlighting off, or around 168 hours with RGB at lowest brightness; real usage varies.

Expert Specs

Specification	Details
Brand	Keychron
Model	J2 QMK Wireless Mechanical Keyboard
SKU	KJ2-H3
Variant	Black, RGB Backlight (Hot-Swappable), Keychron Super Brown
Layout	ANSI, 75%
Number of keys	83
Multimedia keys	12
Switch type	Mechanical, Keychron Super Brown
Switch face	North-facing
Hot-swappable	Yes
Replacement switch compatibility	Most 3-pin and 5-pin MX-style mechanical switches, including Cherry, Gateron, Kailh and Panda
Keycap material	Double-shot PBT
Keycap profiles	Cherry or MDA, depending on keycap option
Frame material	ABS
Connectivity	2.4 GHz wireless, Bluetooth, USB-C wired
Bluetooth version	5.2
Bluetooth device capacity	Up to 3 devices
Bluetooth device name	Keychron J2
Polling rate	1000 Hz in 2.4 GHz and wired modes; 125 Hz in Bluetooth mode
N-Key Rollover (NKRO)	Yes, wireless and wired
Backlighting	22+ RGB options, including static white
Battery	4000 mAh rechargeable lithium-polymer
Wireless working time, backlight off	Around 300 hours; lab result, actual use varies
Wireless working time, RGB on	Around 168 hours at lowest brightness; lab result, actual use varies
Compatible systems	Windows, macOS, Linux
Typing angles	4.5° / 6.4° / 8.8°
Dimensions	332.3 × 139.92 mm (13.08 × 5.51 in)
Weight	808 g (1.78 lb)
Front height, including keycap	20.7 mm (0.81 in)
Rear height, including keycap	41.34 mm (1.63 in)
MCU	WB32F3G71RCT6, 256 KB Flash
Operating environment	-10°C to 50°C