... VGA, USB, network, RS485 PTZ controll, IE browse 4CH DVR H.264 compression, dvr recorder support SATA4CH, M-JPEG compression, support SATA ... ,50 f/s;NTSC 525 line,60 f/sVideo CompressionH.264 main profileVideo RecordingD1:PAL 1f/s-25f/s NTSC 1f ... movement,tour,alarm,email,snapshot & FTPAudioAudio CompressionG711ABidrectional TalkSupport 4CH DVR H.264 compression, dvr recorder support SATA