Excefore Wireless Keyboard Multi-Device - Wireless

✯✯ How to connect 2.4G and Bluetooth ✯✯ 1. Press F1/2.4G, the battery light blinks red, just put USB receiver to PC, it will connect 2. Long Press F2/BT1 for 3 seconds, the battery light blinks blue, which means that Bluetooth 3.0 is ready to pair. You can search Bluetooth 'BT3.0 Keyboard' and connect. When pairing successfully, blue light goes out. 3. Long Press F3/BT2 for 3 seconds, the battery light blinks green, which means that Bluetooth 5.0 is ready to pair. You can search Bluetooth 'BT5.0 KB' and connect. When pairing successfully, the green light goes out. ✯✯ How to switch after devices are connected ✯✯ Just press F1 one time to choose 2.4G device or F2 one time to choose Bluetooth 1 device or F3 one time to choose Bluetooth 2 device About pre-installed batteries There are 2 batteries which are covered by plastic in the back of the keyboard. Please take the plastic off and put it back. Then you can turn it on.