Feature: 1. There are 4 kinds of ways to unlock, support fast fingerprint opening, password opening, IC card opening, emergency mechanical key opening door. 2. It supports virtual password input to prevent others from peeping the password. If your correct password is 123456, you can enter ***+123456+*** to open the door, just add the real password in the middle. 3. The backlit password keyboard allows you to find your door lock even in the dark. Multi‑protection, convenient and easy to use, lifting up for double lock, support lock from the inside, more convenient and safer than conventional mechanical double lock. 4. High adaptability, easier installation, the standard configuration is suitable for any internal, external, left and right opening doors, and is suitable for most home entrance/security doors. Support for Tuya WIFI remote unlocking, which can be used with other also support for Tuya smarts to create a new smart life. 5. With the help of artificial intelligence learning algorithms, for special conditions such as dry and wet, incomplete fingerprints, the recognition rate is optimized to increase the recognition rate. After 100,000 times of measured fingerprint error rate, it is lower than the industry standard of 0.005. Specification: Item Type: Smart Door Lock Material: Zinc Alloy Color: BlackPassword Length: 6-10 digits (Support virtual password) Safety Function: Lift up for double lock, lock from the inside Emergency Power Supply: USB interface Spare Keys: 2pcs Power Supply: 4 x AAA batteries (Not included) Cylinder Level: C-level safety lock cylinder Number of Cards Supported: 100pcs Fingerprint: Semiconductor fingerprint recognition Fingerprint Capacity: 100pcs Password Capacity: 100 groups How to Use: 1. Download for Tuya APP. 2. Open for Tuya APP. 3. Connect to the same WIFI hotspot. 4. Then you can unlock the door use for Tuya APP. Package List: 1 x Lock Outer Panel1 x Lock Inner Panel 1 x Lock Bolt1 x Pinch Plate1 x Buckle Box2 x IC Card2 x Key1 x Screw Pack1 x Installation Accessories Package1 x Manual 1 x Location Card Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.