Black Small Digital Electronic Safe Box Keypad Lock Security Home Office Hotel Exterior dimensions: 7.9"H x 12.2"W x 7.9" D, Interior dimensions: 7.8"H x 12.1" W x 5.5"D Opens with digital PIN or included override key, Hidden lock with two keys Security code from 3-8 digits using any number from 0-9, 3000-time operation life expectancy of battery Time out period after 3 incorrect combination attempts, Body construction with 1.2mm thick solid steel Pre-drilled holes behind the safe with included 2" bolts for anchoring, Inside tamper-proof hinges, Carpet padding on inside bottom, Mounting to the floor, wall or cabinet, NOTE: The safe runs on 4 x AA-Size 1.5V batteries are not included.