... HD SDI CCTV DVR 8ch D1, 3G& wifi spot Support:Arabic,Czech,English,Finnish,Greek,Indonesian,Italian,,Japanese ... VGA output, 1ch HDMI2ch BNC output (include 1ch Spot output), 1ch VGA output, 1ch HDMI Audio Input4 channel ... head count of people passing in and out of duty room, which is fit for flow statistic in ... skid bars, ripple, or a burst of flying spot, thorn or thread type of interference in the video ...