K Ultra
2.4 GHz
Bluetooth 5.2
wired
Sound Absorbing Foam
EPDM Foam
PET Film
Bottom Case Acoustic Foam
Keychron Milk POM Switch
LSA Double-Shot PBT Keycaps
Up to 550 hours
ZMK
8000 Hz
1 MB
1
of
6
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Keychron K3 Ultra 8K Wireless Custom Mechanical Keyboard ISO Layout Collection
SKU:
K3U-H4-SW
CHF 119.90
Unit price
/
Unavailable
Keychron K3 Ultra 8K Wireless Custom Mechanical Keyboard ISO Layout Collection - RGB Backlight (Hot-Swappable) / Swiss-ISO / Keychron Milk POM Banana is backordered and will ship as soon as it is back in stock.
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Experience the K3 Ultra 8K: a premium 75% low-profile wireless keyboard blending natural wood with a metal frame. Features a pro-grade 8K polling rate, tri-mode connectivity, and ZMK firmware for ultimate customization and performance.
Key specs
- Layout: 75%
- Connectivity: 2.4 GHz, Bluetooth, wired; 8000 Hz polling rate
- Switches: Keychron Milk POM Red / Brown / Banana; hot-swappable
- Build: Aluminum + Wood, Anodized Aluminum Alloy plate
- Keycaps: LSA double-shot PBT keycaps, non-shine-through
- Battery: 2600 mAh, up to 550 hours
- Software: QMK firmware; Keychron Launcher web app for key remapping and macros; works with macOS, Windows, Linux
- Backlight: North-facing RGB LED
- Weight: 566 g ± 10 g
- Dimensions: 320.62 x 126.00 mm
- N-key rollover: Yes (wireless & wired)
Product details
Keychron K3 Ultra 8K is an ultra-slim wireless custom mechanical keyboard. It supports 2.4 GHz, Bluetooth, and a wired connection. It allows users to customize any key or macro command on its 75% compact layout through the Keychron Launcher web app. Powered by ZMK firmware, it enables an 8K polling rate in wireless mode while delivering up to 550 hours of battery life. In addition, it includes LSA (low-profile spherical-angled) keycaps and is fully compatible with Windows, macOS, and Linux.
Ultra Series
KEYCHRON K3 ULTRA 8K
The K3 Ultra 8K is a low-profile wireless mechanical keyboard with a sleek 75% layout. 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 K3 Ultra 8K unlocks endless customize possibilities while delivering up to 550 hours of battery life for enhanced productivity in both work and gaming.
Essence
Featured Technologies
COLOR
Color Styles
Precision
2.4 GHz & Bluetooth Connection
Experience the advantage of an 8000 Hz polling rate in both wired and 2.4 GHz modes, delivering ultra-responsive, pro-grade precision for competitive gaming. For seamless multitasking, Bluetooth 5.2 allows you to switch effortlessly between up to three devices. From extreme speed to wireless convenience, the K3 Ultra 8K delivers it all.
Learn how to switch your keyboard to 8000 Hz polling rate
Learn how to switch your keyboard to 8000 Hz polling rate
Worry-Free Power
550 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 550 hours (with the backlight off).
Customize
Wood Meets Metal
The K3 Ultra 8K combines the natural elegance of natural wood with a precision metal frame, creating a look that feels both refined and powerful. 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
Featuring an ultra-thin 11.9mm low-profile switch, the K3 Ultra achieves a sleek front edge profile of just 20.0mm, making this wooden-bodied device one of the thinnest wireless mechanical keyboards in the world while still delivering a distinguished tactile response.
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 and paired with 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 K3 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, which makes the latency hardly noticeable even in competitive games.
Elevated Typing Experience
Interior Acoustic Foam
Elevate your typing with the K3 Ultra featuring advanced IXPE acoustic foam for silent keystrokes and enhanced comfort, coupled with resilient EPDM foam for superior key switch support, responsiveness, and durability. This keyboard redefines the standard for a quiet, comfortable, and responsive 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 K3 Ultra's low-profile double-shot PBT keycaps provide excellent oil resistance while preventing the legends from fading over time.
Polymer Frame
The K3 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.
PCB
The circuit board that registers keystrokes; hot-swappable vversions 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 solid, premium aluminum body for a quieter, vibration-free typing experience.
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 K3 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.
Backlight
Unlock Dynamic Backlit Control
Go beyond standard presets with 22+ RGB backlight settings — including a static white option. Our advanced lighting engine includes two powerful features to fuel your creativity: Per-key RGB and Mix RGB. You can further fine-tune and remap keys with ease, crafting your unique style with vivid, dynamic RGB control.
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?
Guide
Low-Profile Series Differences
K Max
2.4 GHz
Bluetooth 5.2
wired
Sound Absorbing Foam
IXPE Foam
Gateron 2.0 Mechanical Switch
LSA Double-Shot PBT Keycaps
Up to 73 hours
QMK
1000 Hz
256 KB
K Pro
Bluetooth 5.1
wired
/
Gateron 2.0 Mechanical Switch
LSA Double-Shot PBT Keycap
Up to 100 hours
QMK
1000 Hz
128 KB
Precision
Specs
Product Information
Size
320.62 x 126.00 mm
Front Height
16.55 mm (without keycaps)
Back Height
20.1 mm (without keycaps)
Bottom Case Material
ABS Plastic
Feet Height
2 mm
Weight
566 g ± 10 g
Body Material
Aluminum + 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 (Wired & 2.4GHz)
125 Hz (Bluetooth)
125 Hz (Bluetooth)
N-Key Rollover (NKRO)
Yes (wireless & wired)
Wireless Working Time
Up to 550 hours(8K, Backlight off)
Hot-swappable
Yes
Bluetooth Device Name
Keychron K3 Ultra 8K
