... lock safe LCD Operation Tips,Fingerprint ID,capacity 99,alarm,double door safe,safe,office safe,Personality safe fingerprint lock safe ... you close it). Sixth, remind Low voltage lower system uses four 1.5V alkaline batteries, battery full, showed signs of ... for 5 seconds, the system will resume initialization settings, remove all fingerprints. Eight, the system parameters Operating voltage: 4.0V ~ ...