Keychron K2 Pro RGB QMK/VIA Wireless Mechanical Keyboard - Barebone Version (without switch and keycap) A fully customizable wireless custom mechanical keyboard(without switch and keycap) allows anyone to master any keys or macro commands on its 75% compact layout through VIA, compatible with Windows and macOS, and users can hot-swap with any MX mechanical switch in a breeze. Program with QMK & VIA Simply connect the K2 Pro 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). Hot-swappable The hot-swappable sockets are mounted on the PCB, so you can hot-swap every switch on the K2 Pro 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 customize your own typing experience in seconds. All-Around Customizable Keyboard To build a fully customizable keyboard, we designed every component easily assembled. Therefore, you can customize and adjust each component you want. Please Note: All tools are placed on bottom of the box. The barebone version does not include the keycaps and switches. Specification Number of Keys: 84 (75% Layout) Frame Material: ABS N-Key Rollover (NKRO): Yes for both wireless and wired modes Polling Rate (Wired Mode): 1000 Hz Polling Rate (Wireless Mode): 90Hz Connectivity: Bluetooth 5.1 and Type-C cable Stabilizers: PCB-mounted screw-in stabilizers Compatible System: macOS/Windows/Linux Battery: 4000 mAh rechargeable li-polymer battery MCU: Ultra-low-power ARM Cortex-M4 32-bit STM32L432 (128KB Flash) Backlight: South-facing White LED Backlight Weight: About 940 g / 2.07 lbs Dimension: 311.6 x 121.6 mm (12.27 x 4.79")(Plastic frame version)