... , 100f/s (PAL), 120f/s (NTSC). maximum support 2CH of D1 & 2CH of CIF .l 8-36V wide voltage supply design ... synchronous 4 channels preview.Recording ResolutionSupport CIF,HD1,D1 resolution optional, maximum 2CH of D1 ,2CH of CIFVideo Quality1-4 levels, 1 ...