K3U-H1
KEYCHRON K3 ULTRA 8K WIRELESS MECHANICAL KEYBOARD/HOT SWAP/RGB/RED SWITCH-BLK NEW
Keychron K3 Ultra 8K 75% Wireless Mechanical Keyboard, Black, Milk POM Red Switches, 8000 Hz, Bluetooth 5.2, USB-C, RGB, Hot-Swappable
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 |
