Ozone Oracle Bluetooth Smart Door Lock with Rose Plate with 4-way access | Door Thickness: 35-65 mmAnti Theft This feature can be used to hide your password from the public by entering it between sets of random numbers to ensure privacy. There are 3 combinations available, i. e, XXXX 1234 XXXX or 1234 XXXX XXXX or XXXX XXXX 1234 where the numbers represent your password and the x is a random digit Access The digital smart lock can be unlocked using a fingerprint, mobile app, RFID card, emergency key, as well as a password for maximum convenience