The Keychron K5 Ultra 8K Wireless Custom Mechanical Keyboard Black features a full size low-profile layout, an integrated control knob and tactile Keychron Milk POM Brown switches to provide a smooth, responsive typing experience. Tri-mode connectivity via 2.4GHz wireless, Bluetooth 5.2 and USB-C wired connections delivers up to an 8000Hz polling rate, while ZMK firmware, hot-swappable switches, double-shot PBT keycaps, sleek wood accent design, and per-key RGB customisation provide extensive flexibility.
Features
Keychron K5 Ultra 8K Wireless Custom Mechanical Keyboard
Ultra-Slim. Full-Size. Wireless 8K.
The Keychron K5 Ultra 8K combines a full-size low-profile layout, ultra-low-latency 2.4 GHz wireless performance, and up to 370 hours of battery life. Customise every key, macro, and the knob with Keychron Launcher, powered by open-source ZMK firmware.
Ultra Series - Keychron K5 Ultra 8K
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 customisation possibilities while delivering up to 370 hours of battery life for enhanced productivity in both work and gaming.
Featured Technologies
- Metal & Wood Frame
- Hot-Swappable
- Mechanical Milk Pom Switch
- Slim & Portable Design
- Double-Shot PBT Keycaps
- 2.4GHz & Bluetooth
- Mac & Windows
- Connects up to 3 Devices
Paired with many other premium features, such as slim and portable design, double-shot PBT keycaps, 2.4 GHz, Bluetooth 5.2, and more, the Keychron K5 Ultra promises an unparalleled typing journey that transcends expectations.
Colour - Colour Styles
Precision - 2.4 GHz & Bluetooth Connection
- 2.4 GHz wireless: 8000 Hz polling rate for ultra-responsive gaming
- Bluetooth 5.2: Pair with up to 3 devices
- Wired Type-C: Stable performance while charging
- Ultra-fast Wireless 2.4 GHz
- Bluetooth 5.2
- Wired Connection
Worry-Free Power
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.
Elevated Typing Experience - 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.
Switch
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.
Powerful ARM Core - 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.
Elevated Typing Experience - 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.
Customise
Customise Every Part
To build a fully customisable keyboard, Keychron designed every component to be easy to assemble. Therefore, you can customise and adjust each component as you wish.
Keycaps
The K5 Ultra's low-profile double-shot PBT keycaps provide excellent oil resistance while preventing the legends from fading over time.
Polymer Frame
The K5 Ultra 8K pairs natural wood with a precision metal frame, balancing natural elegance with modern, high-performance craftsmanship.
Switches
Switches are the core mechanical components; different types (linear/tactile) offer unique feel and sound.
Plate
The plate in a keyboard secures switches in place, provides structural support, and influences typing feel and sound.
Sound-Absorbing Foam
The sound-absorbing foam (latex foam) can help dampen echo and unwanted noise when typing, providing a clean sound.
IXPE Foam & Pet Film
The IXPE foam reduces keystroke vibration and optimises typing sound, while the PET film provides insulation and dust protection.
PCB
The circuit board that registers keystrokes; hot-swappable versions allow easy switch changes.
Bottom Case Acoustic Foam
The bottom case acoustic foam effectively dampens vibrations and minimises hollow sounds, providing a softer, more cushioned typing experience.
EPDM Foam
This soft foam helps reduce vibration and noise and provides a cushioned typing feel.
Bottom Case
A durable bottom case helps reduce resonance and keeps the keyboard slim, stable, and comfortable for everyday use.
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 customise your experience—no soldering required.
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.
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.
Mix RGB
With Mix RGB, you can split your keyboard into two custom lighting zones, each with unique effects. Design high-contrast combinations to make your entire setup pop with vibrant style.
Keycaps - Low-Profile Double-Shot PBT Keycaps
Designed for a premium typing feel, the K5 Ultra features unique Keychron double-shot PBT keycaps. They are made of durable, non-shine-through PBT material with excellent oil resistance for long-term use.
Launcher Web App - Programme with ZMK & Launcher
The open-source ZMK firmware means endless possibilities for key remapping, macros, shortcuts, and more. Now you can easily customise 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 customising instantly.
- Keymap
- Backlight
- Macro
- Firmware
* Please use the latest version of Chrome, Opera, or Edge and connect the keyboard to your device with a cable to use Keychron Launcher.
Backlight - Unlock Dynamic RGB Control
Choose from 22+ lighting effects, set a static white backlight, or customise lighting by key and zone with Per-key RGB and Mix RGB in Keychron Launcher.
RGB Backlight - Per-Key RGB
With Per-key RGB, every single key is a digital brushstroke. This feature lets you individually customise the colour of each key, transforming your keyboard into a vibrant canvas.
Backed by a 1 year Keychron warranty.
