Elsafe's Sentinel electronic safe mounts on a solid shelf or on an optional pedestal for floor mounting. It measures 7.8 inches high by 16.1 inches wide and 16.1 inches deep, making it suitable for storing valuables, important documents and other items you need to keep secure. The safe is made of steel and uses a locking latch that hooks the door to the frame if a tool is forced between them, to prevent someone from breaking in.