Supports 2.4GHz wireless and USB wired dual mode connection.Supports NKRO in wired mode, and 16 keys without conflict in wireless mode. 87 key compact layout, saves more room on your desktop.Pure white backlit, and with 8 kinds backlit displaying modes for option. Press Fn+ScrLK to switch to. Power saving, the backlit automatically turns off after 1min inactivity, keyboard turns into sleep mode after 3mins no operation. Blue Switch: Tactile and clicky with a bump feel. It is suitable for typing. Blue switch is louder than other mechanical switches when typing. Wireless & Wired Dual Mode White Backlit Mechanical Gaming Keyboard Bluetooth connection method Reminder: Bluetooth pairing is required for the first use of Bluetooth mode, wired / Bluetooth mode switching method: FN + P indicator flashes to indicate successful switching . Pairing method: 1. Make sure that it is currently in Bluetooth mode (judgment method: Fn + Q, indicator flashes-Bluetooth mode; indicator does not flash-wired mode) 2. Bluetooth pairing: press and hold Hold down the P key while holding down Fn, release it when the P key flashes, and add (search) a Bluetooth keyboard pairing connection named RK bluebooth keyboard on the computer. After successful pairing, the P key stops flashing 3. Multi-group Bluetooth pairing method, in the first step, Fn + Q / W / E can be used to pair three groups of Bluetooth devices.