MULTIPLEUNLOCKING METHODSSEMICONDUCTOR FINGERPRINTSENSOR IS SAFE , STABLE SENSITIVEAND FASTFOR THE ELDERLY FINGERPRINT WEAR FEATURES OFSHALLOWFINGERPRINT , STANDARD SMART MAGNETICEASY TO OPEN THE DOORHidden mechanical keys are bothbeautiful and meet your emergencyunlock needsMaterial: aluminum alloycolour: blackPackage Contents: 1 x Home Smart LockOnly the above kit content, other products should not included.Note: Light reflection and assorted reveals may cause the colour of the article in the photograph slightly different from the real thing. The measurement allowed error is +/- 1-3cm.