Material: ABS Bluetooth: Bluetooth 3.0 Number of keys: 78 keys Key technology: X architecture Key life: 5 million times Key height key: less than 0.3mm Key strength: 80 ± 15 Working voltage: 5V ± 0.3V Working current: MAX3mA Operating distance: 10M Link method: 1. Turn on the switch and press FN and C at the same time to enter the Bluetooth connection state 2. Turn on Bluetooth on the device, search for the device, "Bluetooth Keyboard" appears, click to connect directly, no pairing code is required. 3. Press FN and Q, FN and W, FN and E at the same time to select the corresponding system. 4. Toggle the button next to the switch to ch2 to connect the second Bluetooth device. The connection method is the same as above. 5. After connecting the two devices, you can switch the devices by toggling the ch1-ch2 buttons.