Description: Advanced Biometric Fingerprint Identification: Everyone has a unique fingerprint and no one can steal it. The smart lock adopts advanced fingerprint technology-scratchproof, dustproof and waterproof sensor to make unlocking easy and secure. 100 fingerprints can be enrolled. Identification time is less than 0.5 seconds. Anti-peep Password: "Anti-peep password" ensures that strangers cannot steal your password by watching you nearby when you enter the password. This function allows the user to type in any numbers before or after the correct password (As long as the correct password is embedded in the longer set of numbers) and can still gain access. 4 Ways to Gain Access: Fingerfrint, password, key, and inductive cards. Each lock comes with 2pcs keys, 1pcs management card and 3pcs inductive cards. Concealed key hole to keep dust away and prevent damage. Soild Construction: High grade stainless steel panel and steel lining, durable and can overcome the shortcomings of oxidation and color degradation. Wide Application: Can be used for wood doors and metal doors. Suit for door of 40mm to 70mm thickness. Note: set of passwords. If you set a new password, the original password will be invalid. Specification: Material: Metal Front Panel Size: Approx. 72x42x360mm/2.83x1.65x14.17 inches Back Panel Size: Approx. 72x25x360mm/2.83x0.98x14.17 inches Power Supply: 4pcs AA Batteries (Not Included) Package Includes: 2 Piece Lock 8 Pieces Cards 4 Pieces Keys Note: Since the size above is measured by hand, the size of the actual item could be slightly different from the size above. Due to the lighting effects, monitor settings, etc. There could be some slight difference in the color tone of the pictures and the actual item.