Easy to operate Not only can you open the door with your fingerprint, card, key, or password, but you can also use the tuya APP (BLE) to open the door, which is very intelligent and convenient. Ergonomic design, simply place your fingerprint on the door and you can easily unlock it within 1 second. The smart lock will automatically lock you, keeping you and your home in a secure state at all times. Your fingerprint is unique in the world, which undoubtedly ensures security. By utilizing semiconductor technology and biological characteristics, the same fingerprints are avoided. In addition, the smart lock is made of durable aluminum alloy material, ensuring reliable quality. Multi functional fingerprint lock meets the standards of most lever locks, equipped with a bag of screws and a 50 * 50mm lock body (22 * 175mm), which can be fixed on doors with a thickness of 30-100mm. Energy saving design No need to worry about pollution or wasting money anymore. Including 4 * AAA batteries