Dual systems and circuits design. The lock will alarm and change to standby circuit, when the main circuit is with low power. When the standby circuit is with low power, it lock will alarm. Dual motors design. You can start the standby motor to open the lock, when the main motor is broken down. No lock hole design, it completely abandons the traditional key and lock, in the fully opened and closed by remote controllers, realized the real security. Indoor touch Design, you can open/close the lock by touch the lock body when indoor. It is very convenient. Tiger lock method, more safe and stable., Manufacturer: DMETE