Keychron - K4 Ultra 8k Wireless Mechanical Keyboard

KEYCHRON K4 ULTRA 8K

The K4 Ultra 8K is a wireless mechanical keyboard with a 96% layout. It delivers an ultra-responsive experience with an 8000 Hz polling rate in both wired and wireless modes. Supporting Bluetooth, wired, and ultra-low-latency 2.4 GHz connectivity, it adapts seamlessly to any setup. Powered by the open-source ZMK firmware, it unlocks endless customization possibilities while delivering up to 600 hours (8K, backlit off) of battery life for enhanced performance in both work and gaming.

Tri-Mode Connectivity

Unlock the power of an 8000 Hz polling rate in both wired and 2.4 GHz wireless modes, delivering ultra-responsive, pro-grade precision for competitive gaming. With Bluetooth 5.2, you can seamlessly switch between up to three devices for effortless multitasking. From lightning-fast performance to versatile wireless connectivity, the K4 Ultra 8K does it all.

Up to 600 Hours of Wireless Endurance

With a 4000 mAh battery, optimized firmware, and an enhanced circuit design, the K4 Ultra 8K delivers up to 600 hours of use at an 8000 Hz polling rate with the backlight turned off, redefining what wireless performance can achieve.

An Epic Core Inside

Inside the K4 Ultra 8K lies a powerful MCU with 1 MB flash, delivering unmatched flexibility for deep customization and advanced functionality. It achieves an ultra-responsive 8K polling rate, ensuring every keystroke is registered with near-zero latency and exceptional accuracy for the most demanding gaming and professional tasks.

96% Compact Layout

The 96% compact layout keeps the full-size keyboard experience in a more space-efficient form. It retains the essential function row, arrow keys, and numeric keypad while reducing unnecessary gaps, giving you more room on your desk without sacrificing productivity. Whether you're handling spreadsheets, typing long documents, coding, or gaming, it delivers a practical balance of familiar control, efficient workflow, and everyday comfort in a streamlined footprint.

From Productivity to Play, Instantly

The K4 Ultra 8K transitions effortlessly between work and play. During the day, its 96% compact layout gives you a full-size typing experience with a numeric keypad while saving valuable desk space for coding, writing, spreadsheets, and focused tasks. When it’s time to unwind, the 8000 Hz polling rate and ultra-low-latency wireless connection provide the speed and precision needed for smooth gameplay. One keyboard, built for every part of your day.

Keychron Apex Switch

The K4 Ultra 8K comes with pre-lubed Keychron Apex Switches, crafted for gamers and typists who demand precision, durability, and a refined typing experience. The switch stem features a reinforced wall structure that enhances stability for smoother, wobble-free keystrokes and helps prevent dust and moisture from entering the switch housing for long-lasting performance.

Hot-swappable

Since everyone has unique typing preferences, the K4 Ultra 8K features a hot-swappable switch design, allowing you to easily swap switches in seconds and customize your experience—no soldering required.

Double-Shot PBT Keycaps

Designed for a premium typing experience, the K4 Ultra 8K features double-shot PBT keycaps made from durable, non-shine-through PBT material. With excellent oil resistance, they are built to maintain a clean, refined look over the long term.

Suitable For All Devices

The K4 Ultra 8K is seamlessly compatible with both macOS and Windows, including dedicated keycaps for each system to deliver a consistent and intuitive typing experience across devices.

Customize Every Part

To make the keyboard fully customizable, we designed each component to be easy to assemble, adjust, and personalize.

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. With its built-in AI assistant (live in beta now), keyboard customization is no longer complicated — just ask in plain language, and AI handles the rest.

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.

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.

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.