Biometric Door Handle: Modern and simple smart door lock, can be used in multi doors like front door, bedroom and apartment, APP + fingerprint unlocking meet most unlocking requirements, just throw away your keys. APP Control: Door knobs controlled all by a smartphone APP, add and manage fingerprints, share ekeys, set auto-lock time, add timed, permanent, one-time, recurring fingerprint and ekeys, set different ekeys for different people.