1,Semiconductor fingerprint heads, BiologicalLive fingerprint recognition, preventing false fingerprints, sensitive and quick recognition. 2,Zinc alloy material, wear proof and scratch proof, antioxidant, long lasting. 3,Automatically lock, don't worry about forgetting to lock the door. 4,AntiDuplication card, built in microchip, eliminating the possibility of being copied. 5,Temporary passwords can be set for friend visits, household services, etc. 6,5 unlock ways: fingerprint unlocking, password unlocking, mobile phone APP unlocking, card unlocking, keys unlocking. 7,You can remotely control the status of the lock through your mobilephone, view unlock records, and add/remove unlock fingerprints. 8,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: 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 1 x Lock 1 x Screw Pack 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-Minnanxin