Features: Compact size. Easy to operate. Smart and convenient. Battery-powered and cordless. Suitable for HXQ908D HXQ909E HXQ910D HXQ910E HXQ920 door lock. How to Use 1. Open the battery cover you will find there is a Setting key in the middle of the left battery jar. 2. Press the Setting key for about 2 seconds. 3. The LED lamp will be on and you will hear bee, bee. 4. Press every remote controller for a second until you hear a bee. The methods of setting telephone controller and code board are the same as its. 5. Press the Setting key for a second until you hear a bee, bee. 6. Test whether each remote controller can work normally after setting. 7. If one of the remote controllers doesnt work, please follow the above steps to reset it. How to Reset 1. If you lose a remote controller carelessly, please reset other remote controllers. 2. Resetting them by following the above steps. 3. The lost controller will be invalid after resetting them. You can use the new controller at ease.