Features:
*No lock hole design, it completely abandons the traditional key and lock, open and close by remote control or phone APP, realized real security.
*Tiger lock method, more safe and stable. No keyholes outside, there is no way for thieves.
*Add USB external power source function. Make sure the lock works when battery was dead. (battery not included)
*Three unlock modes optional: Phone APP unlock, Remote control unlock, Indoor emergency button unlock.
*Easy installation on all kind of doors, very convenient.
