The lock is made of aluminum as a material with high hardness and corrosion resistance, which can effectively prevent others from damaging the door lock from the outside and further ensure your home security. This lock is compatible with most American standard doors and can be easily installed with just a screwdriver. It also comes with a simple app that allows you to enjoy a smart life by programming the lock effortlessly. Connect via Bluetooth, the lock can store 50 passwords and fingerprints and key fobs,and with a Wi-Fi gateway (sold separately),you can control the lock remotely anytime, anywhere. 5-in-1 ways to unlock include APP, Password, Key Fob, Fingerprint, and Key. 3-in-1 ways to lock include Auto Lock, APP Lock, Long press the "√ "button to lock.