Product characteristics: 1.5 ways to unlock: WeChat applet, fingerprint unlock, card unlock, PIN code unlock, mechanical key unlock; 2. Virtual password settings, suitable for various scenarios; 3. Administrator settings to help you better manage your smart buildings; 4.Compact size fit all wooden doors and metal doors; 5.FPC fingerprint reader offers you the best security experience; 6. Power supply with USB interface in case of power loss. Specifications: Unlock: Fingerprint/RFID Smart Card/Password/Mechanical Key. Materials: zinc alloy. Auto-lock: Yes Left or right door support: Yes Low battery reminder function: yes (less than 4.8V) Battery type: 12V/4 AA batteries (not included). Working temperature: -10-60 Fingerprint capacity: ≤100pcs Password Capacity: ≤100pcs Paper Capacity: ≤100pcs >>>>>How to determine whether the lock fits your door or not? (1) The door must be drill a small extra hole; (2) Measure the thickness of the door; (3) Measure the length of the guide plate; (4) Measure the width of the guide plate.