Hotouch Electronic Digital Lock Keypad Safe Box Home Security Cash Size: 31 x 20 x 20cm (L x W x H); 1inch= 2.54cm Digital entry. Master key included in the even of forgotten or lost codes. Door measures 2" thick Requires 4 AA batteries (included) Package Content:1 x Digital Electronic Safe Security Box+2 x Key+1 x 2 pieces of 2 1/2" anchor bolts+4 x AA batteries+1 x Use Manual