Keychron
Keychron K2 Ultra 8K
Released 2026
Researched from maker specs and published sources. Last checked Oct 18, 2026.
K2 Ultra 8K, from Keychron's store
The K2 Ultra 8K is a 75% with 8000 Hz polling, ZMK firmware, a CNC aluminum and ABS case and a 760-hour battery claim. TechRadar liked the value and found it thick and the stock switch depth a little off.
Our take, based on research
A value-priced 8 kHz 75%. Check the firmware and thickness first.
Overview
The K2 Ultra 8K is Keychron's 8 kHz K2. The page lists a 75% layout, 2.4 GHz plus Bluetooth plus wired, 8000 Hz polling in wireless and wired modes, ZMK firmware with the Launcher web app, hot-swappable Keychron Apex switches (Red, Brown or Banana), a CNC aluminum and ABS case with a steel plate, OSA double-shot PBT keycaps, a 4000 mAh battery rated up to 760 hours, south-facing RGB and a weight of 1084 g.
TechRadar said the aluminum frame feels solid, the double-shot PBT keycaps are good but do not let the backlight through, the red switches were slightly lubed and snappy but actuated a little too deep so some presses did not register, and the board's thickness hurt its wrists without a wrist rest. It judged the K2 Ultra 8K good value against pricier rivals.
It differs from the K2 Max in firmware (ZMK, not QMK/VIA), polling (8 kHz) and battery rating, so QMK/VIA users should read the firmware line before buying.
Pros & Cons
- 8000 Hz polling over 2.4 GHz and wired (maker)
- Up to 760 hours battery rating (maker)
- CNC aluminum and ABS body with steel plate at 1084 g
- Hot-swap Apex switches; TechRadar found the reds well damped
- Double-shot PBT keycaps
- Runs ZMK firmware, not QMK/VIA, which changes how remapping works (maker)
- TechRadar's reds actuated a little deep and missed some presses
- Thick and tall; TechRadar needed a wrist rest
- Keycaps are opaque, so the backlight does not shine through (TechRadar)
- Stock switches and keycaps may not suit everyone
Who Is This For?
- Competitive players who want 8 kHz wireless in a 75%
- Users who want very long battery life between charges
- Buyers who prefer an aluminum frame
- Existing QMK/VIA users who want to keep that firmware
- People who prefer a low-profile, thin board
- Anyone who dislikes a tall keyboard
Where to Buy
Dimensions
311.50 x 121.54 mm
Weight
1084 g +/- 10 g
Case Material
CNC Aluminum + ABS
Connectivity
Both
Plate Options
Case Colors
Software Support
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