1-4 channels Car DVR H.264 Compression Support 3G, GPS, WIFI Support CIF,HD1,D1 resolution Support 2 SD Card Car DVRFunctionItemDescriptionRecording SystemChannel1-4 channelsResolutionSupport CIF,HD1,D1 resolution, compatible with 2CH of D1 & 2CH of CIF. fps: 1 to 25f/s/ch adjustable (PAL) or 30f/s/ch (NTSC) .Video Quality1-4 levels, 1 is the highest level and 4 is the lowest level.OSDOverlays ...