4Ch Home Security Camera System, 1080P DVR & 4pcs HD Weatherproof Cameras, Ni...
Audio Input / Output: 4CH RCA / 1CH RCA. 1 x 4CH HDMI DVR. 4 Channel 720P HD DVR surveillance Kit(No HDD). DVR Specifications Simply insert the HDD into the DVR’s compatible bay to start recording—no extra tools required for installation.