Keychron K5 Ultra 8K Wireless Custom Mechanical Keyboard
Keychron K5 Ultra 8K Wireless Custom Mechanical Keyboard - Fully Assembled / Black / Keychron Milk POM Switch - Red is backordered and will ship as soon as it is back in stock.
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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. Customize 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 customization possibilities while delivering up to 370 hours of battery life for enhanced productivity in both work and gaming.
Essence
Featured Technologies
COLOR
Color Styles
Precision
2.4 GHz & Bluetooth Connection
• Bluetooth 5.2: Pair with up to 3 devices
• Wired Type-C: Stable performance while charging
Learn how to switch your keyboard to 8000 Hz polling rate
Precision
2.4 GHz & Bluetooth Connection
• Bluetooth 5.2: Pair with up to 3 devices
• Wired Type-C: Stable performance while charging
Learn how to switch your keyboard to 8000 Hz polling rate
Precision
2.4 GHz & Bluetooth Connection
• Bluetooth 5.2: Pair with up to 3 devices
• Wired Type-C: Stable performance while charging
Learn how to switch your keyboard to 8000 Hz polling rate
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.
Customize
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.
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.
Customize
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.
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.
Customize
Customize Every Part
To build a fully customizable keyboard, we designed every component to be easy to assemble. Therefore, you can customize 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 optimizes 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 minimizes 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.
Customize
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.
Keycaps
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.
LAUNCHER WEB APP
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.
Backlight
Unlock Dynamic RGB Control
Choose from 22+ lighting effects, set a static white backlight, or customize 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 customize the color of each key, transforming your keyboard into a vibrant canvas.
Learn how to set Per-key RGB on Launcher
Customize
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.
Learn how to set Mix RGB on Launcher
Guide
What's in the Box?
Why choose K Ultra?
Choose K Ultra if you want the lowest latency, longest battery life, ZMK customization, and the most refined acoustic structure in the low-profile K series.
K Ultra
K Max
K Pro
Precision
