Main feature: With blue LCD displaycapacity: 50 FingerprintsIt could record and search the opening history.The controller could add or delete any guest?s fingerprint he chooses.Stainless steel, never wear or tearwith false key with LFR3 optical fingerprint sensorSimple installation Performance indexOperating voltage ：4x1.5V　AA battery power peak ＆#118alue：1W，0.5W averageoperating temperature ：（out ）－10°C－75°C　 (inner)0°C－60°C identify speed :less than 2 secondsFalse rejection rate: 1/1000False acceptance rate: 1/1000000