Keychron K2 Max K2M-J3 QMK Wireless Mechanical Keyboard Brown Switch 75% US
The Keychron K2 Max is a premium 75% wireless mechanical keyboard with QMK customization, hot-swappable brown switches, 2.4GHz/Bluetooth/wired connectivity, south-facing RGB, and enhanced acoustic foams for superior typing.
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The Keychron K2 Max (K2M-J3) is a versatile 75% wireless mechanical keyboard featuring hot-swappable brown switches, QMK firmware, and multi-device connectivity via 2.4GHz (1000Hz polling), Bluetooth 5.1 (3 devices), or USB-C wired. It delivers an upgraded typing experience with multiple acoustic foam layers (IXPE, PET, EPDM), steel plate, and south-facing RGB lighting compatible with Cherry-profile keycaps.
Built with a durable ABS+aluminum frame, OSA-profile double-shot PBT keycaps, and screw-in PCB stabilizers, the K2 Max supports both Mac and Windows layouts with system toggle. Powered by a 4000mAh battery offering up to 256 hours (backlight off), it features an ARM MCU with 256KB Flash for advanced customization via the Keychron Launcher web app.
- 84 ANSI keys with 12 multimedia functions
- 1000Hz polling in 2.4GHz/wired modes, NKRO support
- 22+ RGB modes, adjustable brightness/speed
- Ergonomic 3-level typing angles (5°/9°/12°)
- Includes: keyboard, case, steel plate, foams, keycaps, switches, USB-C cable, 2.4GHz receiver, tools
| Layout | 75% ANSI (84 keys) |
| Switches | Keychron Super Brown (Hot-swappable 3/5-pin MX) |
| Keycaps | Double-shot PBT, OSA profile |
| Frame | ABS + Aluminum |
| Backlighting | South-facing RGB (22+ modes) |
| Connectivity | 2.4GHz (1000Hz), Bluetooth 5.1 (90Hz), USB-C wired (1000Hz) |
| Battery | 4000 mAh (256h backlight off, 100h RGB low) |
| Polling Rate | 1000Hz (2.4GHz/Wired), 90Hz (BT) |
| N-Key Rollover | Yes (wired/wireless) |
| MCU | ARM Cortex-M4 32-bit STM32F402 (256KB Flash) |
| Dimensions (keyboard) | 317 x 122 x 32-42 mm (W x D x H) |
| Weight (keyboard) | 1080 g |
| Compatibility | macOS, Windows, Linux |
| Multimedia Keys | 12 |