17 mm at the front
A low-profile board 306 mm wide and 525 g — the one that actually goes in the bag.
Keychron
K3 Max
75% low-profile wireless keyboard, ISO layouts
A low-profile 75% board, 17 mm at the front and 525 g, on QMK with hot-swappable low-profile switches.
- 75%
- ISO
- Low profile
- QMK / VIA
- 2.4 GHz
- Bluetooth 5.1
- USB-C
- 1550 mAh
At a glance
Three ways in
2.4 GHz at 1000 Hz, Bluetooth 5.1 across three devices, or USB-C.
QMK and VIA
Every key remapped in the Keychron Launcher web app, with nothing to install.
Hot-swappable
Gateron and Keychron low-profile mechanical switches, changed without a soldering iron.
Low profile, and what that is for
Eleven millimetres tall without keycaps, seventeen with them, and 525 g in total. A low-profile board asks less of the wrist because the hand does not have to climb to reach it, and it fits in the same sleeve as the laptop — which is the difference between owning a mechanical keyboard and travelling with one.
Three typing angles
2.5°, 4.2° or 6.5°, on flip-out feet. On a board this thin the angle matters more than it does on a tall one, because there is no wrist rest doing the work.
Hot-swappable, low profile
Switches pull out and push in with no soldering. One limit is worth knowing: the K3 Max takes Gateron and Keychron low-profile mechanical switches only — QMK does not support low-profile optical switches, so the optical version of the same shape is not interchangeable with this one.
Low-profile double-shot PBT
The keycaps are LSA profile — low, spherically dished and angled, so the fingertip sits in the key rather than sliding across it. Double-shot PBT: the legend is a second piece of plastic, not paint, and PBT does not develop the shine ABS picks up with use.
Redesigned stabilisers
The long keys — spacebar, shift, enter, backspace — run on stabilisers redesigned for the Max series, pre-lubricated so they land evenly instead of clattering on one side.
Mac and Windows on one board
A toggle on the board moves it between macOS and Windows, and the extra modifier keycaps for both systems are in the box. Twelve of the keys in the top row double as media controls.
QMK and VIA, in a browser tab
The board runs QMK firmware, and every key, layer and macro is remapped in the Keychron Launcher web app — nothing to install, and the mapping is written into the keyboard so it travels with it. Twenty-two RGB backlight modes are set the same way.
ISO layout versions
The K3 Max is built fully assembled in four ISO layouts. Ask us which are in stock.
In detail
Specification
Keyboard
- Layout
- 75%, 84 keys · ISO
- Switches
- Gateron low-profile mechanical, north-facing
- Switch support
- Hot-swappable, Gateron and Keychron low-profile mechanical only
- Keycaps
- LSA profile, low-profile double-shot PBT
- Media keys
- 12
- Backlight
- South-facing RGB, 22 modes
- N-key rollover
- Yes, wired and wireless
- Firmware
- QMK / VIA, set in the Keychron Launcher
Connectivity and power
- Connection
- 2.4 GHz / Bluetooth / USB-C
- Bluetooth
- 5.1, up to three devices
- Polling rate
- 1000 Hz on 2.4 GHz and wired, 90 Hz on Bluetooth
- Battery
- 1550 mAh lithium-polymer
- Battery life
- About 73 h with the backlight off, about 42 h at the lowest RGB brightness
- Controller
- ARM Cortex-M4 STM32F402, 256 KB
- Operating systems
- macOS, Windows, Linux
Physical
- Dimensions
- 306 × 116 mm
- Weight
- 525 g
- Height
- 17 mm at the front and 22 mm at the back with keycaps; 11 and 15 mm without
- Typing angles
- 2.5° / 4.2° / 6.5°
- Frame
- ABS with an aluminium frame
- Operating temperature
- −10 °C to 50 °C
Figures published by the manufacturer. Battery life is a laboratory result and varies with use.
Interested in this keyboard?
This page presents equipment we distribute; it is not a shop and nothing is sold here. Write to us about availability, layouts and trade terms, or buy it from one of our partners.