The proximity sensor detects your hand to illuminate keys and offers a 5 digit code with over 40,000 possible combinations. The biometric scanner is high resolution, and grants quick and accurate access to the safe. The 3.7 Volt Lithium battery gives you three months on a single charge under normal use. Includes two backup keys, a reachable battery, charging kit, mounting hardware, security cable, and a user manual.!-- split --0