ORVIBO C1 Smart WiFi Door Lock. A door lock with a simple, elegant, and stylish design for your smart home. 5 ways to unlock the door: Fingerprint, Card, Password, Approved Code/OTP, and Backup Keys. Enjoy an easy, smart, and keyless secure life. Opening records and push notifications every time it's opened in the smartphone app. Technical Specifications: User: Battery: 4 AA batteries Operating Voltage: DC 3V Working Current: