... CMOS sensor 2.support 1280*720 resolution 3.IR distance: 50m 4.built-in SD card slot 5 ... brightness, contrast , acutance, color adjustableInfrared ImageBuilt-in IR-CutAudioCompression standardG.711InterfaceOne 3.5mmlinear input interface, one 3 ... portSerial interfaceOne RS485 interfaceOthersInfrared48 Infrared lamps, 80m infrared distance at mostLinkage alarmVideo sheltered, motion detective, detector, ...