This is a nice smart door lock. Very fancy if I do say so myself. Came nicely packaged and intact. What I like about this keyless entry lock is that it is convenient to lock & unlock my door. Whether I use the fingerprint scanner or the key fob or the keypad with my unique code. This lock can also be utilized with an app on your smart phone if you choose this option at purchase. It's just a simple gesture to lock and unlock the door which is nice if your hands are full and can't reach your keys. It is very sensitive and precise to your entry options for security for example you must position your finger on the print pad exactly the way you programmed it into the platform upon setup otherwise it will give an operation failed warning. There is a hidden keyhole option if necessary which is awesome in the case of an emergency .The lock itself can be USB powered as well as battery in case of a power outage. This lock is very simple to install with the manual directions and the locking mechanism hardware is adjustable if necessary. I like it and would recommend it.

4-in-1 Smart Deadbolt Door Lock - Biometric, Key Card & Key Access - Seamless Keyless Entry with TT/Tuya APP Control for Enhanced Home Security