HDView 32CH 4-in-1 DVR for 720P/1080P TVI/AHD/CVI/Analog Cameras, Surge Protection, 1080P HDMI, COC, Commercial Grade Security DVR 32 Channel 4-in-1 DVR (TVI/AHD/CVI/CVBS) Advanced Mobile Phone App, COC (control over coax) Support TV Line analog camera and 720P 1080P TVI/AHD/CVI camera 1080P Super Clear Megapixel Video, with 1080P HDMI Video Output No Hard Drive Installed