1. Four Ways To Unlock Your Door APP (Tuya Bluetooth) + Fingerprint Recognition + Password + Mechanical key 2. Easy To Install A easy-to-follow instruction would help you to install your smart door lock easier. If you are purchasing our lock to change your old lock, just use your original door borehole, no need to drill extra door boreholes. The required diameter of the door hole is 1.77”-2.36“ (45 - 60 mm) It fits any door with a thickness between 1.38” and 1.97“ (35-50 mm) 3. Smart Tuya APP Control Please download “Tuya Smart” or “Smart Life” APP in the Google Store or App store. The APP support below functions: One key unlocking via Bluetooth: Tap and Hold the key on the screen to unlock Check the unlocking records Set dynamic password code and share it with visitors, nannies, house keepers, tenants, guests, etc. Add fingerprint on the APP and then you could unlock your door by fingerprint, support to add 100pcs fingerprint. Add password on the APP and then you could unlock your door by password, support to add 30sets password. Normally-on mode: you can set the door lock to remain open without entering the password or fingerprint. 4. Anti-peep Password and Safe Virtual password entry with anti-monitoring function. You can enter a string of numbers before or after the correct password to confuse bystanders. For example, if the correct door opening password is 123456, enter 00000+123456 + 0000 to open the door. 5. Emergency USB Power Supply Our smart door lock would alarm if it is in low battery. You could temporary charging your lock by power bank through Type C-USB port.