D-Type: DB15 X 2 Video Input(s):4, 6, 8, 10, 12,16 Cams Audio Input(s):1 Channel Recording Rate At 320 X 240 Resolution :30 fps (NTSC), 25 fps (PAL) Display Rate:30 fps (NTSC), 25 fps (PAL) Compression Format ：MPEG4, Wavelet H.264