3-in-1 smart lock: this biometric door lock has 3 types of keyless entry: fingerprint + PIN + spare mechanical key. The smart lock with keypad also features the latest biometric fingerprint access technology with an accurate recognition rate, opening the door in just 0.3 seconds. You can add up to 50 sets of fingerprints. No more fumbling with keys when you go out. A wide range of solid materials: the smart lock with handle is made of zinc alloy for corrosion resistance and a sleek, elegant, clean and stylish look, providing a higher level of security and privacy for your home, flat, office, hotel or any other personal space. Simplified installation: Unlike other apps or WIFI smart locks, this smart fingerprint door lock offers the same value and a more reasonable price, saving a great deal of installation complexity and app compatibility issues. The entire installation process can be completed in minutes and left and right doors can be installed without wiring and drilling.