Single package included: 1*Fingerprint lock 1*Cylinder parts 1*Screws Set 1*Manual How to use it ? Register fingerprint: Shortly press Register key for 2 sec Blue LED will Glow, Put fingerprint on sensor 5 Times, Green LED Stable for 2 sec means register OK You can register next one. As mentioned above. Delete fingerprint: Long press Register key for 5 Sec. Red LED come means delete all fingerprints back to factory setting. Now,any fingerprint can open lock. Correct usage: Finger must touch the panel,then lock can check fingerprint unlock,will auto close after 5s. Note: Default factory settings,pls register fingerprint after install it! Emergency power port:DC5V Android Micro USB. Panel:Fingerprint sensor image arround is sensor area,each time checking fingerprint, finger must touch the panel! QR Code on Box is there for Installation Video And Configuration Video. You will get Youtube link from QR Scanning. Also, We are providing Video Call Support if required. Our Mobile Number is Mentioned on Box.