Safstar Digital Electronic Security Safe Box Wall Safes Lock for Jewelry Cash Valuable Home Office Hotel (Black: 9.2" x 6.8" x 6.8") Material: Solid Steel, 0.22-cubic-foot capacity, Exterior Dimensions: 9.2" x 6.8" x 6.8", Interior Dimensions: 8.9" x 6.5" x 6.5" (Please pay full attention to the dimension for this MINI safe box) Electronic lock can easily be programmed by the user with a "Safety Key" override,easy operation with digital PIN or override Key Security code from 3-8 digits using any number from 0-9, Time out period after 3 incorrect combination attempts The safe runs on 4 x AA-Size 1.5V batteries(Includes), with 3000-time operation life expectancy of battery. it has 2 pre-drilled holes for mounting to the floor, wall or cabinet Great security for money, jewelry, small pistol and valuables at home, on the road or in the office,hotel