... 1.R-D8104 4CH H.264 DVR 2.H.264 DVR, 4CH video in 3.IE, mobile phone 4.PAL ... /NTSC, support 1 SATA 5.4CH playback,PTZ control Robustsecu R-D8104 4 Channels Digital ... Video Recorder R-D8104 4CH H.264 DVR Compressed ... , bit rate, image quality and so on.Support 4 channel play back, synchronized playback at single channel, ...