Features -Programmable user code function -Guesthouse master code function -LCD display with easy to operate 3 to 8 digits -Programmable user / guest code -Time Lock safe locks down for 5 minutes after 3 wrong attempts -Silent input option -Secret input option -Batteries positioned on the outside (no need to unlock the safe to change them) Locking Mechanism -16mm locking bolts -Electronic lock with handle opening -Tubular pin tumbler lock