HZ-53 Biometric Burglary Safe 30 minutes fire protection (fire liner) 5/16" thick solid steel-plate door 5 active round locking-bolts 3/4" Dia. thick Velvet lined interior No wake-up code needed (one button wak-up) Up to 30 fingerprint users User-friendly, easy programming 4 pre-drilled anchor holes (bottom) Mechanical key override External power override Battery operated - 4 "AA" batteries included