Keychron K3 Ultra 8K Wireless Custom Mechanical Keyboard

Keychron K3 Ultra 8K Wireless Custom Mechanical Keyboard - View 3

Keychron K3 Ultra 8K Wireless Custom Mechanical Keyboard - View 4

Keychron K3 Ultra 8K Wireless Custom Mechanical Keyboard - View 5

Keychron K3 Ultra 8K Wireless Custom Mechanical Keyboard - View 6

$79.19 ~~$109.99~~ In stock

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.

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Standard Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

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Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

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United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

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Customer Reviews (4.6 / 5 · 5 reviews)

Harper K. ★★★★★ Oct 23, 2026

Switching between my laptop and tablet is seamless thanks to the tri-mode connectivity. Customizing the macros for my work shortcuts took just a few minutes, and the ultra-slim design makes it feel like it's barely there.

Madison ★★★★★ Oct 21, 2026

I’ve been using the triple connection modes—switching from Bluetooth to wired is seamless when I need zero latency in games. The ability to remap any key or macro command has cut my editing workflow in half.

Chloe C. ★★★★★ Oct 18, 2026

Switching between my work desktop and tablet is seamless with the tri-mode connectivity, and the ultra-slim profile makes it easy to toss in my bag. I've already remapped a few macros for my editing workflow, and the 8K polling feels buttery smooth.