Electronic lock can easily be programmed by the user with a "Safety Key" override. 20 second warning "beep" will be actived and time out period after 3 incorrect combination attempts. The safe runs on 4 x AA-Size 1.5V batteries, with 3000-time operation life expectancy of battery. Safes have 4 pre-drilled holes for mounting to the floor, wall or cabinet. Specifications: Color: Black Material: Solid Steel Operation: Digital Pin or Override Key Original code: 159, then press A or B Overall Dimensions: 13.8" x 11.8" x 19.7" Weight: 37 lbs Interior Dimensions: 13.5" x 11" x 19.5" Door opening: 12.5" x 17.5" Body Thickness: 2mm solid steel Door Thickness: 4mm solid steel Battery Required: 4 x AA-Size 1.5V Time Out Period: After 3 wrong entries Package includes: 1× Safe Box 2×Keys(Please do not keep emeragency key in the safe) 4×Pieces of 1/4 Anchor Bolts for Mounting 4×AA-Size 1.5V Battery 1×Velvet Cushion 1×Instruction Manual Caution: Please take out the emeragency key and keep it in a safe place.Please read the instruction thoroughly before using the unit. Please retain this manual for future reference. This item is in the category "Home & Garden\Home Improvement\Home Security\Safes". The seller is "salesuperior" and is located in this country: US. This item can be shipped to United States.