Feature: 1. 5 Ways to Unlock: Biometric door lock enjoys easy entry with our 5 in 1 unlock method, including for Tuya APP, fingerprint, code, key, and IC card access for added convenience and security. With FPC sensor, just needs 0.5 second fast fingerprint recognition, and with a valid password of 6-10 digits and support for front and rear virtual passwords. 2. for Tuya APP Mode: for Tuya Smart (compatible with for iOS version) of smart door knob can be downloaded from the application store, and the compatible with for Android version can be download from the application store. Open BT on smartphone and click to "Add device", Select lock, and select "Start BT distribution network", and then connect it. It can check the record by cloud record. 3. USB Rechargeable: Thumbprint door knob powered by 4*3A batteries (not included). When the voltage is below 4.8V, there will be a voice alarm prompt every time the lock is opened (it is expected to open the door about 100 times). There has USB emergency power socket, which can be used to open the door by charging the door with a power bank device through the USB interface when there is no power at all. 4. Multiple Function: Fingerprint door knob with trial and error locking function that after 5 consecutive password verification failures or 30 fingerprint failures, the system locks for 90 seconds and emits an alarm sound. Supporting mobile app to generate remote passwords for customers to input to unlock. Also support mobile app apartment management function. 5. Easy Installation: Firstly, install 4*3A batteries (not included) in correctly direction in the smart lock , and insert the front handle into the lock body. Secondly, disassemble the rear handle to 2 parts, and install the part A align to square bar and install part B, and then screw connecting screws tightly. Finally, insert and rotate the key 180 degrees in the keyhole after finishing the installation, and the rotate the front handle to test. Specification: Specification: Product material: Aluminum alloy Product size: Front handle: 6.8 x 5.5cm / 2.67 x 2.16in Rear handle: 64mm / 2.51in Surface process: Anodizing Fingerprint collection window: Semiconductor biological activity recognition, recognition time less than 0.5 seconds Fingerprint storage capacity: 100 pieces Password storage capacity: 50 sets (valid password length 6-10 bits, supporting up to 16 virtual passwords) IC card storage capacity: 30 pieces Mobile App: for Tuya Smart (BT) Unlock method: Fingerprint, password, IC card, BT, key, remote temporary password Fingerprint collection resolution: 500 DPI Rejection rate: (FRR)