Door Type: Wooden & Steel Doors Open Method: Mobile App(Tuya) - Face Recognition - Fingerprint - Password - Magnetic Card - Master Key Smart Functions: WIFI 2.4 G - Generate Temporary Password - Magnetic IC 13.56 MHz Mifare Cards - Anti-theft Alarm - There is emergency power input 5V 2A Micro USB Other Features: Direction Left and Right - Cat Eye Camera - 300 Users Batteries: 7.4V lithium 4200 mah