KEYCHRON 

Keychron KB K3M-H3 K3 Max QMK VIA WL Custom Gateron low-profile Brown RGB RTL

Mfg Part Number:  K3M-H3  
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Price: $115.51
Quantity:
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Last Updated: Jan 27, 2026
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The K3 Max is a low-profile wireless mechanical keyboard with a 75% layout. It supports 2.4 GHz, Bluetooth, and wired connections. Empowered by QMK/VIA, it offers endless possibilities and enhanced productivity in your work and gaming!

2.4 GHz & Bluetooth Connection

Experience peak gaming performance on the fly with the 2.4 GHz wireless connection boasting a rapid 1000 Hz polling rate. For seamless multitasking across your computer, phone, and tablet, you can effortlessly connect the K3 Max via Bluetooth 5.1 to three devices.

Ultra-Slim

The innovative low-profile Gateron switch is 31% slimmer than conventional normal profile switches makes the aluminum body K3 Max one of the thinnest wireless mechanical keyboards in the world. While still delivering a distinguished tactile response.

Program with QMK & VIA.

QMK/VIA means endless possibilities for a fluid workflow. Thanks to our engineering team, it's the first time in history that a wireless mechanical keyboard has these kinds of capabilities right out of the box.

Simply connect the K3 Max to your device with a cable, drag and drop your favorite keys or macro commands to remap any key you want on any system (macOS, Windows, or Linux).

ARM Cortex-M4 32-bit STM32F402 MCU which is powerful, and equipped with 256K Flash will provide more flexibility for developers.

Get the K3 Max keymap working on VIA

Since the VIA code for the K3 Max version is still awaiting approval from Github, it is not yet automatically recognized. Please download the appropriate keymap JSON file below, open VIA, turn on "Show Design tab" on "Settings" tab, and drag the JSON file into the "Design" tab on VIA to get the K3 Max keymap working on VIA.

Suitable For All Devices

Offers a Mac layout while remaining compatible with Windows. It stands out in the market by providing the same multimedia and function key functions as Apple keyboards for Mac users, but with enhanced tactile feedback.

Additionally, you can configure different keymaps for both Mac and Windows devices. The VIA software is compatible with macOS, Windows, and Linux. The keyboard includes keycaps for both macOS and Windows, along with additional esc and enter keys, facilitating seamless switching between operating systems.

An Epic Core Inside

A powerful ARM architecture MCU equipped with 256KB Flash will provide more flexibility for developers. The polling rate is 1000 Hz on 2.4GHz and wired modes right out of the box, which makes the latency hardly noticeable even in competitive games.

Interior Acoustic Foam

Elevate your typing with K3 Max featuring advanced IXPE acoustic foam for silent keystrokes and enhanced comfort, coupled with resilient latex foam for superior key switch support, responsiveness, and durability. Redefining the standard for a quiet, comfortable, and responsive typing experience.

Hot-Swappable (Optional)

We also provide a hot-swappable version for your choice, which means you can customize your typing experience without soldering, pop them in and it's done.

We all have our unique typing preferences, that's why we are offering hot-swappable option on the K3 Max, so you can easily hot-swap every low-profile Gateron mechanical switch in a few seconds to customize the typing experience without soldering.

More from the Manufacturer

Main Specification
General Information
Manufacturer Keychron
Manufacturer Part Number K3M-H3
Manufacturer Website Address http://www.keychron.com
Brand Name Keychron
Product Series K Max
Product Model K3 Max
Product Name K3 Max QMK/VIA Wireless Custom Mechanical Keyboard
Packaged Quantity 1
Product Type Keyboard
Keyboard/Keypad
Keyswitch Technology Mechanical
Keyboard/Keypad Connectivity Technology Wired/Wireless
Keyboard/Keypad Wireless Technology Bluetooth/RF
Wireless Operating Frequency 2.40 GHz
Number of Keys 84
Keyboard/Keypad Features N-key Rollover
Keyboard/Keypad Features Hot-swappable Switches
Backlight Yes
Backlight Type RGB LED
Bluetooth Version 5.1
Interfaces/Ports
Keyboard/Keypad Host Interface USB Type C
Wireless Receiver Interface USB Type A
Battery Information
Battery Rechargeable Yes
Maximum Battery Run Time 3.3 Day
Power Description
Power Source Battery
Physical Characteristics
Product Material Polybutylene Terephthalate (PBT)
Product Material Acrylonitrile Butadiene Styrene (ABS)
Case Material Aluminium
Keyboard/Keypad Height 0.43"
Keyboard/Keypad Width 12.05"
Keyboard/Keypad Depth 4.57"
Weight (Approximate) 1.16 lb
Miscellaneous
Package Contents
  • K3 Max QMK/VIA Wireless Custom Mechanical Keyboard
  • 1 x Type-C Cable
  • 1 x Type-A to Type-C Adapter
  • 1 x Type-A 2.4GHz Receiver
  • 1 x Switch Puller
  • 1 x Keycap Puller
Operating System Compatibility Mac OS
Operating System Compatibility Windows
Operating System Compatibility Linux
Platform Supported Mac
Platform Supported PC
Device Supported Notebook/Tablet
Device Supported Smartphone
WARNING:: The plastic used in cable products can expose you to lead and lead components, chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information go to www.P65Warnings.ca.gov
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