Description

Expert Features

Ultra-Slim 75% Layout: A compact 75% keyboard with a low-profile design for a tidy desk and comfortable everyday use.
8000 Hz Polling: Get 8000 Hz polling over 2.4 GHz wireless and wired connections; Bluetooth polling is 125 Hz.
Three Connection Modes: Connect through 2.4 GHz, Bluetooth 5.2, or USB-C wired mode.
Keychron Milk POM Red Switches: K3U-H1 is the fully assembled black version with low-profile linear Red switches.
Hot-Swappable Switches: Swap compatible Keychron Milk POM switches without soldering.
Connect Up to Three Bluetooth Devices: Pair the keyboard with up to three devices and switch between them.
ZMK and Keychron Launcher: Customize keymaps, macros, shortcuts, backlighting, and firmware through the Launcher web app.
Up to 550 Hours of Battery Life: Keychron’s listed runtime is up to 550 hours with backlight off; actual usage varies.
Low-Profile LSA Keycaps: Double-shot PBT keycaps use Keychron’s low-profile LSA shape and are non-shine-through.
RGB Customization: Choose from 22+ RGB settings, including static white, and personalize per-key or mixed-zone lighting.
Natural Wood and Metal Frame: Combines natural wood accents with an aluminum frame for a slim, refined build.
Multi-OS Compatibility: Compatible with Windows, macOS, and Linux; includes Mac and Windows keycaps.

Expert Specs

Specification	Details
Brand	Keychron
Model	K3 Ultra 8K Wireless Custom Mechanical Keyboard
SKU	K3U-H1
Variant	Fully Assembled, Black, Keychron Milk POM Red
Layout	75% compact
Switch type	Low-profile Keychron Milk POM Red mechanical switches
Hot-swappable	Yes; Keychron Milk POM switches
Keycaps	Low-profile LSA double-shot PBT; non-shine-through
Body material	Aluminum + wood
Bottom case material	ABS plastic
Plate material	Anodized aluminum alloy
Stabilizer	Plate-mounted
Backlight	North-facing RGB LED; 22+ settings, including static white
Connectivity	2.4 GHz, Bluetooth 5.2, Type-C wired
Polling rate	8000 Hz wired and 2.4 GHz; 125 Hz Bluetooth
N-Key Rollover (NKRO)	Yes, wireless and wired
Bluetooth device capacity	Up to 3 devices
Bluetooth device name	Keychron K3 Ultra 8K
Battery	2600 mAh rechargeable lithium-polymer
Listed wireless working time	Up to 550 hours with backlight off at 8K; actual use varies
Compatible systems	macOS, Windows, Linux
Dimensions	320.62 × 126.00 mm
Front height	16.55 mm without keycaps
Back height	20.1 mm without keycaps
Feet height	2 mm
Weight	566 g ± 10 g
Operating environment	-10°C to 50°C