Security Lock: The lock is ideal for indoor, residential, and commercial use to replace traditional door knob, providing added security for any home or office with multiple access methods. User Management: The master user can enroll or eliminate up to 50 fingerprints and 50 PIN codes, allowing convenient access management for business owners. Advanced Scanner: The semi-conductor reader has self-learning ability, making fingerprint identification more accurate as the usage time increases. It can also set to auto lock for safety. Convenient Design: Anti-peep password ensures that others can't steal password by observing the keypad. Powered by 4 AA batteries that can last up to 8 months.