1、USB rechargeable design, you don\u0027t 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, don\u0027t 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 * AAA battery (not included) Suitable door thickness: 35-50mm Item size: 70 * 70 * 45mm / 2.8 * 2.8 * 1.8in Package size: 220 * 180 * 65mm / 8.7 * 7.1 * 2.6in Package weight: 900g / 2.0lb Packing List: 1 * Lock 1 * Set of Installation Tools 1 * Lock 1 * Set of Installation Tools