How to Use: Can be wired, can be wireless, can be connected via BT Wired: FN and Y wired mode, plug and play Wireless: Press and hold the FN and Q channel indicator to flash quickly, and then plug the USB2.4G connector into the computer's USB port. (The light must be flashing before plugging in the USB adapter) BT connection: The name is "BT3.0 Keybpard, BT 5.0 KB" FN and E=BT channel 1 green indicator FN and R=BT channel 2 blue indicator FN and T=BT channel 3 yellow indicator Specification: Item Type: Mechanical Keyboard Material: ABS Color: Blue Connection Method: Support Wireless2.4G, BT3.0, BT5.0, Type C Wired Lighting: Monochromatic White Light, Multiple Lighting Modes Conflict of Keys: No Conflict for All Keys Battery Capacity: Built in 1800mAh Lithium Battery (included) Ergonomics: Support Working Voltage: 5V DC Working Current: 300mA (maximum) Standby Current: 0.5mA Compatible System: For Win 2000, for Win ME, for Win XP, for Win Vista, for Win 7, for Harmony OS, for Win 8, for Win 10, for Android, for IOS and Other Systems Package List: 1 x Mechanical Keyboard 1 x Adapter 1 x Key Puller 1 x Data Cable Note: Shipped with Built in Battery