Specifications Bluetooth Version: Bluetooth 5.1 Bluetooth Range: 10 meters Working Voltage: 3.3-4.2V Working Current (Average Typing Speed without Backlight): 2.0mA Standby Time: 1500h Charging Time: 4h Continuous Working Time with the Brightest White Backlight: 8h Auto-sleep Time of the Backlight: 30s Auto-sleep Time of the Keyboard: 30min (Bluetooth will disconnect during deep sleep mode. Any key can be pressed to wake it up.) Lithium Battery Capacity: 800mAh Continuous Working Time Without Backlight: 320h Bluetooth Pairing Name: Dexnor Keyboard Troubleshooting If the keyboard doesn’t work, please check: If its battery has run out, if yes, please charge it immediately. If the Bluetooth connection fails, turn off the keyboard and restart it after 10 seconds, and the keyboard will reconnect to your device automatically. If the problem still exists, go to Tablet’s Settings-Connections-Bluetooth-Paired devices to delete Dexnor Keyboard. Then reconnect the keyboard according to the previous connection steps. If the Bluetooth connection still fails, press ESC key and Delete key together for 3 seconds to restore factory settings. Then reconnect the keyboard. Or you can restart your Tablet and then check if the keyboard can work normally.