Keychron K2 Max QMK Wireless Mech Keyboard Brown Switch
K2M-J3 | KeychronThis product has been discontinued
Features
Keychron K2 Max QMK Wireless Mechanical Keyboard

Keychron K2 Max
The K2 Max is a wireless mechanical keyboard with a 75% layout. It supports 2.4 GHz, Bluetooth, and wired connections. Configurable through QMK and Keychron Launcher web app, it offers endless possibilities and enhanced productivity in your work and gaming!
The K2 Max upgraded the typing experience with multiple layers of acoustic foams, such as IXPE, PET, and EPDM, ensuring a superior sound and typing experience.
- Launcher Web Configurator
- Enhanced Acoustic Foams
- South-Facing RGB
- Support macOS & Win
- 1000 Hz Polling Rate
- Hot-Swappable
- 2.4 GHz & Bluetooth
- OSA PBT Keycaps

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 K2 Max via Bluetooth 5.1 to three devices.
Program with QMK & Launcher
The open-source QMK firmware means endless possibilities for key remapping, macros, shortcuts, and more. Now you can easily Customise each key with the Keychron Launcher web app.
* Please use the latest version of Chrome / Opera / Edge browser to open the Launcher and connect the keyboard to your device via wired mode.
- macOS
- Windows
- Linux icon

Significantly Enhanced Acoustic Foams
Elevate your typing with K2 Max featuring advanced IXPE acoustic foam for enhanced comfort, coupled with resilient EDPM foam for superior key switch support, responsiveness, and durability. The steel plate provides responsive feedback and a peaceful typing sound, while added weight will enhance the stability.

Suitable for All Devices
Built with the Mac users’ experience in mind while still retaining compatibility with Windows devices, the K2 Max comes with a system toggle and an additional set of Customised keycaps for both Windows and macOS systems. You can now save two different layouts on the keyboard, one for each system.
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.

Hot-Swappable (Optional)
Every detail matters for a Personalised typing experience, that’s why we give you the power. You can hot-swap every switch on the K2 Max with almost all of the 3pin and 5pin MX style mechanical switches on the market (including Cherry, Gateron, Kailh, Panda, etc.) without soldering. You can Customise your own typing experience in seconds.
Keychron Super Switch
Our exclusive Keychron Super switch adopts a new mold with unparalleled precision. Every switch is tested for pro-grade quality and has a lifespan of up to 50 million clicks, providing great reliability and high performance for long typing sessions. Its new light affection structure on its transparent top housing also ensures high light transmittance and a more consistent, brighter backlight effect.
OSA Profile Double-Shot PBT Keycaps
To further fine-tune your typing experience, the K2 Max comes with Keychron's unique OSA profile (OEM profile with spherical-angle) and double-shot PBT keycaps that aim to provide a more comfortable fingertip feel with excellent oil resistance for long-term use on the 75% layout.

Screw-In PCB Stabilisers
Even a small part matters for your fingertip feel. We’ve integrated the PCB-mounted screw-in stabilisers for a smoother typing experience with less wobbliness on the big keys such as space bar, shift, enter, and delete. The Keychron K2 Max also supports third-party screw-in PCB stabilisers.
South-Facing RGB Backlights
The south-facing RGB is designed to better illuminate the keyboard backlight from the typist’s angle. The south-facing RGB is also free from interference when the user installs Cherry-profile alternative keycaps on their keyboard.
Comes with more than 22 types of RGB backlight settings. You can further fine-tune the RGB hue, saturation, brightness, effect speed with ease.

Ergonomic Support
Three levels of adjustable typing angle (5º, 9º & 12º) and curved OSA-profile keycaps are all working together to provide long-lasting ergonomic support for your wrist.
Specifications
General Data
| Model Number | K2M-J3 |
| Switch Colour | Brown |
| Number of Keys | 84 (75%) |
| Switches | Keychron Super mechanical |
| Switch Face | South-facing |
| Number of Multimedia Keys | 12 |
| Frame Material | ABS / ABS+Aluminium frame |
| Keycap Material | Double-shot PBT |
| Keycap Profile | OSA (OEM profile with spherical-angle) |
| Layout | ANSI |
| Polling Rate (2.4GHz and Wired Mode) | 1000Hz |
| Polling Rate (BT Mode) | 90Hz |
| N-Key Rollover (NKRO) | Yes for both wireless and wired modes |
Connectivity and Power
| Backlit | 22 types of RGB backlight options plus endless possibilities |
| Battery | 4000 mAh rechargeable li-polymer battery |
| Wireless Working Time (Backlit Off) | Up to 256 hours (Lab test result may vary by actual use) |
| Wireless Working Time (RGB) | Up to 168 hours (Lowest brightness) |
| Connection | 2.4 GHz / Bluetooth / Type-C wired |
| Bluetooth version | 5.1 |
| Bluetooth Device Name | Keychron K2 Max |
| Compatible System | macOS / Windows / Linux |
Physical Unit
| Dimension (Plastic Frame Version) | 311.54 x 121.54mm (12.27 x 4.79") |
| Weight | 940g / 2.07 lbs |
| Dimension (Aluminium Frame Version) | 316.62 x 126.56 mm (12.47 x 4.98") |
| Weight | 1080g / 2.38 lbs |
| Height Incl. Keycap (Front) | 32.06 mm (1.26") |
| Height Incl. Keycap (Rear) | 41.54 mm (1.64") |
| Typing Angle | 5º, 9º and 12º |
| MCU | ARM Cortex-M4 32-bit STM32F402 (256KB Flash) |
| Operating Environment | -10 to 50℃ |
What's Included
| Keyboard | 1 x Fully Assembled Keyboard |
| Includes | 1 x Case 1 x PCB 1 x Steel Plate 1 x Sound Absorbing Foam 1 x IXPE Foam 1 x PET Film 1 x EPDM Foam 1 x Bottom Case PET Film 1 x Silicone Bottom Pad 4 x Sets Stabilisers 1 x Set Keycaps (PBT Double-shot) 1 x Set Switches |
| Cable | 1 x Type-A to Type-C Cable |
| Receiver | 1 x Type-A 2.4GHz Receiver 1 x Extension Adapter For Receiver |
| Tools | 1 x Keycap & Switch Puller 1 x Screwdriver 1 x Hex Key (Aluminium-Frame Version only) |
Keychron Super Switch Features
| Operating Force | 55 +15 gf |
| Pre-Travel | 2.0 ±0.4 mm |
| Travel Distance | 4.0 ±0.4 mm |
| Behaviour | Tactile |
| Pre-Lubed | Yes |
| Sound Level | Gentle |
| Suitable For | Midway Office/gaming |
| Spring Length | Single-stage 15.2 mm |