... 7.0 inch WVGA touch screenCamera Embedded 1.3M Pixel Digital CameraDoor Phone Microphone, 2W/8 OHM Speaker (controllable volume) ... output Relay output 3 relay outputs SD card One Secure Digital card slotBattery Build-in Li-ON battery , 4.2V/ ... applications, much more than traditional time attendance single-purpose use terminal, such as Access Control, Time Attendance, Visitor Management, Club ...