Advantages:

　　1. Being installed inside the room,it's invisible for the people outside the door.

　　2. You can lock or unlock it in the range of 20 meters with the remote keys.

　　3. You can change the password by register the new one unlimitedly.

　　4. Besides the remote keys, you can also operate it by touching the lock when being inside the door.

　　5. The 2 AA betteries can last for more than 6 month.

　　6. You can also use the AC power besides the battery.

　　7. Besides the remote control keys,it can support the mobile phone controller.

　　8. Besides the remote control keys,it can support the code board.

　　Specification: