Actual item may look different. SMPTE292M (HD-SDI) / CVBS 1.0Vp-p (75ohm). 4x hd-sdi outdoor security dome camera 2 megapixel 1080p sony cmos 1000 tvl wdr this item is in the category consumer electronics\surveillance & smart home electronics\home surveillance\security cameras. What is the benefit of HD cameras?