VGE Electronic Large Burglary SafeProduct Description Electronic lock which is simple to operate and can be programmed with any combination of 3 to 8 personal numbers, giving many millions of potential combinations. Combo can be changed an infinite number of times by the user. Security and power status shown by a series of LED displays and Buzzer feedback for each operation. With 4AAsize(1. 5V) back up batteries. Batteries Included** Comes with 2 high security manual override keys.