Tuya APP management, remote unlock + unlock record reminder + temporary password.Mobile phone unlock reminder,check the unlock records via App to ensure the safety of family members. Biological fingerprint recognition, quick unlocking. Long battery life, low battery warming, batteries can last about 6 months, with USB emergency power interface. Normally open door mode: After adjustment, the door can remain open after being opened and will not be automatically locked. Door opening/lock tongue direction: handle direction can be adjusted freely, both "Left opening" and "Right opening" are OK.