The K5 Ultra 8K is a low-profile wireless mechanical keyboard with a sleek 100% full-size layout and integrated knob. Featuring a premium natural wood and metal frame, it delivers an ultra-fast 8K polling rate in both wired and wireless modes for exceptionally responsive performance. It supports Bluetooth, wired, and ultra-low-latency 2.4 GHz connectivity. Empowered by open-source ZMK firmware, the K5 Ultra 8K unlocks endless customization possibilities while delivering up to 370 hours of battery life for enhanced productivity in both work and gaming.

Key Features

2.4 GHz & Bluetooth Connection
3 Different connectivity modes - 2.4 GHz wireless 8000 Hz polling rate for ultra-responsive gaming. Bluetooth 5.2 to pair with up to 3 devices and Wired Type-C for stable performance while charging

370 Hours of Use on a Single Charge
Don't wait for a full charge—use it even while charging and enjoy uninterrupted performance with an impressive battery life of up to 370 hours in wireless 8K mode with the backlight off.

Wood Meets Metal
The K5 Ultra 8K blends warm natural wood accents with a slim, precision-built low-profile body, creating a refined look that feels modern, minimal, and performance-ready. The contrast of warm wood texture and sleek metal craftsmanship delivers a premium balance of natural beauty and modern performance.

Ultra-Slim, Full-Size Comfort
With an 11.9 mm low-profile switch and a 20.0 mm front edge, the K5 Ultra 8K keeps a full-size layout in a slim, comfortable profile—ideal for long typing sessions and clean desk setups.

Keychron Milk POM Switch
Crafted with advanced self-lubricating POM and POK materials, the Keychron Milk POM Switch delivers an impressively smooth feel right out of the box and becomes even smoother over time with every keystroke. Pre-lubed for added consistency, it delivers a deeper, more resonant thock in a low-profile design, it offers a refined and reliable typing experience across linear Red and tactile Brown or Banana switch options.

Hot-swappable
Since everyone has unique typing preferences, the K5 Ultra features a hot-swappable design. You can easily swap out every Keychron Milk POM switch in seconds to customize your experience—no soldering required.

An Epic Core Inside
A powerful ARM-architecture MCU equipped with 1 MB of flash provides more flexibility for developers. The polling rate is 8000 Hz in 2.4 GHz and wired modes right out of the box, making latency hardly noticeable, even in competitive games.

Interior Acoustic Foam
The K5 Ultra 8K features a carefully engineered acoustic structure with IXPE acoustic foam, EPDM foam, PET film, and bottom case foam. Working together, these premium materials effectively reduce unwanted resonance and vibrations, delivering a cleaner, more refined typing sound and a more satisfying typing experience.

Suitable for all devices
Designed for seamless compatibility across macOS and Windows. Easily switch between operating systems with the included Mac and Windows keycaps for a familiar typing experience on every device.

Low-Profile Double-Shot PBT Keycaps
Designed for a premium typing feel, the K5 Ultra features our unique double-shot PBT keycaps. They are made of durable, non-shine-through PBT material with excellent oil resistance for long-term use.

Program with ZMK & Launcher
The open-source ZMK firmware means endless possibilities for key remapping, macros, shortcuts, and more. Now you can easily customize each key with the Keychron Launcher web app.No software download required. Open Keychron Launcher in a supported browser, connect the keyboard with a cable, and start customizing instantly.

Technical Specifications
Size: 436.6 x 128.29 mm
Front Height: 15.55 mm (without keycaps)
Back Height: 19.94 mm (without keycaps)
Bottom Case Material: ABS Plastic
Feet Height: 2 mm
Weight: 720 g ± 10 g
Body Material: ABS + Wood
Keycap: LSA double-shot PBT keycaps, non-shine-through
Plate Material: Anodized Aluminum Alloy
Switch: Keychron Milk POM Switch
Stabilizer: Plate-mounted stabilizer
Backlight: North-facing RGB LED
Battery: 2600 mAh Rechargeable lithium-polymer battery
Compatible System: macOS/Windows/Linux
Operating Environment: -10 to 50 °C

Performance
Connectivity: 2.4 GHz / Bluetooth 5.2 / Type-C Wired
Polling Rate: 8000 Hz / 2000 Hz / 1000 Hz
N-Key Rollover (NKRO): Yes (wireless & wired)
Wireless Working Time: Up to 370 hours (8K, Backlight off)
Hot-swappable: Yes
Bluetooth Device Name: Keychron K5 Ultra 8K

What's in the box
K5 Ultra 8K Fully Assembled Keyboard
Type-C Cable
Type-A to Type-C Adapter
Manual
Quick Start Guide
Extra Keycaps Set
Extension Adapter for Receiver
Type-A 2.4Ghz Receiver
Tools (Keycap & Switch Puller)