... , support SATA HardDisk, Mouse, with VGA, USB, network, RS485 PTZ controll, IE browse 4CH DVR H.264 compression, dvr recorder support SATA4CH, M-JPEG ... ,PTZ movement,tour,alarm,email,snapshot & FTPAudioAudio CompressionG711ABidrectional TalkSupport 4CH DVR H.264 compression, dvr recorder support SATA