... ease of use..Optical Sensor.High resolution camera.Internal backup battery.1 touch a-second ... VersionFinger v10.0CommunicationRS232/485, TCP/IP, USB-hostCamera300,000 pixels cameraStandard FunctionsWorkcode, SMS, DLST, Scheduled-bell ... , Self-Service Query, Automatic Status Switch, T9 input, photo-ID, ID card, Backup Battery, web ...