5 unlock ways: Fingerprint, Password, IC Card, Mechanical Key ,APP Carved alloy Material Built Strong enough to protect your home; Indoor double lock knob gives you one more safeguard; Low battery warming. One time full charge can work about 3 month. Suit for Lots of door type: Wooden door, stainless steel door, bronze door, Double door, Old-fashioned security doors, Manufacturer: CCZRD