1.Open MethodSmart door lock supports fingerprints, passwords, IC Cards, and mechanical keys. 2.Premium MaterialFingerprint Door Lock with Handle is made of zinc alloy and aluminum materials, which is sturdy, outdoor waterproof, sturdy and can be used for a long time. 3.Easy to InstallBiometric Door Lock is simple and convenient to install, suitable for narrow sided aluminum doors, wooden doors, stainless steel doors, PVC doors, etc. Applicable door thickness 40-120MM 4.Easy to UseSliding Door Smart Lock, long handle design, smart and practical, supports USB temporary power supply to open the door, easy to use. With bell button and power reminder function 5.Dummy Password DesignKeyless Entry Door Lock adopts a dummy password design. You can enter any number before and after the correct password. As long as it contains consecutive correct passwords, the lock can be opened.