1,USB rechargeable design, you donu0027t need to worry its battery. 2,Semiconductor fingerprint heads, BiologicalLive fingerprint recognition, preventing false fingerprints, sensitive and quick recognition. 3,Zinc alloy material, wear-resistant and scratch resistant, antioxidant, long-lasting. 4,Automatically lock, donu0027t worry about forgetting to lock the door. 5,AntiDuplication card, built-in microchip, eliminating the possibility of being copied. 6,Temporary passwords can be set for friend visits, household services, etc. 7,5 unlock ways: fingerprint unlocking, password unlocking, mobilephone APP unlocking, card unlocking, keys unlocking. 8,You can remotely control the status of the lock through your mobilephone, view unlock records, and add/remove unlock fingerprints. 9,When there is an abnormality in the lock, it will send an alarm in real-time through the APP to protects home safety day and night. This is a multifunctional electronic lock that supports multiple unlocking methods, remote control on the mobilephone, and other functions to protects family safety and make it more convenient to use. Features: USB rechargeable design, you don't need to worry its battery. Semiconductor fingerprint heads, BiologicalLive fingerprint recognition, preventing false fingerprints, sensitive and quick recognition. Zinc alloy material, wear-resistant and scratch resistant, antioxidant, long-lasting. Automatically lock, don't worry about forgetting to lock the door. AntiDuplication card, built-in microchip, eliminating the possibility of being copied. Temporary passwords can be set for friend visits, household services, etc. 5 unlock ways: fingerprint unlocking, password unlocking, mobilephone APP unlocking, card unlocking, keys unlocking. You can remotely control the status of the lock through your mobilephone, view unlock records, and add/remove unlock fingerprints. When there is an abnormality in the lock, it will send an alarm in real-time through the APP to protects home safety day and night. Specifications: Color: black, coffee, silver (optional) Material: zinc alloy Fingerprint capacity: 100 Password capacity: 200 Battery: 4 x AAA battery (not included) Suitable door thickness: 35-50mm Item size: 70 x 70 x 45mm / 2.8 x 2.8 x 1.8in Package size: 220 x 180 x 65mm / 8.7 x 7.1 x 2.6in Package weight: 900g / 2.0lb Packing List: 1 x Lock 1 x Set of Installation Tools 1 x Lock 1 x Set of Installation Tools Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store