Features:*Fingerprint,RFID card to open the door:Support 1000 fingerprint, 1000 users card capacity, data storage security is not lost.*It is equipped with an additional card and a delete card,easy to add and delete.*TF/SD Card upload/download the data,searching is more convenient and quick. TF/SD memory card can be used to upload, download data.(Note:TF/SD card is not included).*Support doorbell function, by connecting, you can ring the doorbell to remind to open the door.*High safety, strong stability, stable and reliable,easy and simple to handle.