The Stark KONIKA 1255 electronic wall safe is composed of an electronic unlocking lock with motorized deadbolts. The proprietary microprocessor and the user code goes from 6 to 10 digits or letters with the emergency factory code. The memory is not volatile in the absence of power and the membrane keyboard has 12 keys. The sound and optical feedback with red and green LEDs typing, error, low batteries. Powered by 1 9-volt alkaline battery. The bolts are in 22 mm diameter treated steel.