Keychron K5 Ultra 8K Wireless Custom Mechanical Keyboard

SKU: KEYC-K5U-H3

$249.90

Type

Fully Assembled

Color

Black

Switch Type

Keychron Milk POM Switch - Red Keychron Milk POM Switch - Brown Keychron Milk POM Switch - Banana

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. 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.

Metal & Wood Frame

Hot-Swappable

Mechanical Milk Pom Switch

Slim & Portable Design

Mac & Windows

Double-Shot PBT Keycaps

Connects up to 3 Devices

COLOR

Color 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 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.

MULTIFUNCTION KNOB

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.

Keychron-K5-Ultra-8K-Wireless-Custom-Mechanical-Keyboard-SWITCH-2__kc_full_5d09345783.png

Keychron-K5-Ultra-8K-Wireless-Custom-Mechanical-Keyboard-2__kc_full_d051efbaa2.jpg

Add Keychron Milk POM Low Profile Switch To Cart

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.

Elevated Typing Experience

INTUITIVE CONTROL AT YOUR FINGERTIPS

Designed to enhance your workflow, the aluminum rotary encoder provides smooth and precise volume control by default. With Keychron Launcher, you can customize the knob to your preferred commands, such as adjusting screen brightness, zooming in/out, changing brush size, controlling media, or managing backlight settings.

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.

Keymap

Backlight

Macro

Firmware

Keychron-K5-Ultra-8K-Wireless-Custom-Mechanical-launcher-keymap-3__kc_full_24cc9280b7.jpg

Keychron-K5-Ultra-8K-Wireless-Custom-Mechanical-launcher-backlight-2__kc_full_42646888ee.jpg

Keychron-K5-Ultra-8K-Wireless-Custom-Mechanical-launcher-MACRO__kc_full_91a825920b.jpg

Keychron-K5-Ultra-8K-Wireless-Custom-Mechanical-launcher-FIRMWAR-2__kc_full_2ad04f4e7f.jpg

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?

Keychron-K5-Ultra-8K-Wireless-Custom-Mechanical-Keyboard-in-box-1.jpg

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.