Maximum 120 fingerprints
Add a new user in seconds
No computer programming required
No keys to hide, carry, lose or forget
Appropriate for door thickness: 30mm-60mm
3 different ways to open: fingerprint, password and mechanical key (for emergency use)
Powered by 4* batteries or 6V~9V external power
Warming beeps and red indicator lights when the battery is low
Suitable for indoor doors, best substitute for knob locks