Four unlock modes: The electronic lock supports four unlock modes: fingerprint, password, APP and mechanical key. automatically records the number of door openings. If the password is wrong, an alarm will sound (the sound can be adjusted), and the security factor is high.Privacy Password: Users can set a privacy unlock password (random number + correct number + random number) to ensure that personal information is protected when opening the door. At the same time, it supports temporary password/normally open mode, which is convenient for guests to visit.Easy to Install: The security lock is designed to fit most doors in Mexico (35-55mm thickness), comes with parts and instructions, no drilling required, easy to install. You can adjust the direction (left/right) of the operating lock according to the actual situation.Low Battery Warning: The digital lock requires batteries. There is a low battery warning to remind you to replace the battery in time.