Pinnaco WAFU Smart Lock Wireless Keyless Door Lock with Remote Control

(battery not included).. Make sure lock works when battery was dead. Add type-C external power source function. If you don’t need this function, you can close it by yourself. Automatically lock function. No keyholes outside, there is no way for thieves. Tiger lock method, more safe and stable. It is very convenient. Indoor Design, you can open/close lock by lock body when indoor. No lock hole design, it completely abandons traditional key and lock, in fully opened and closed by remote controllers, realized real . Easy installation on all kind of doors, very convenient. You can start standby motor to open lock, when main motor is broken down. Dual motors design. When standby circuit is with low power, it lock will alarm. lock will alarm and change to standby circuit, when main circuit is with low power. Dual systems and circuits design