DVR 4CH, H.264 compression, support SATA HardDisk, Mouse, with VGA, USB, network, RS485 PTZ controll, IE browse 4CH DVR H.264 compression, dvr recorder support SATA4CH, M-JPEG compression, support ... SATA HardDisk, USB*NTSC:30FPS PAL:25FPS*4ch separate video display and compression, video ...