Video/Audio input :4 channel video input, 4 channel audio input. Video output: 1CH TV, 1CH VGA, 1CH HDMI HD output. Operating System: Embedded LINUX. USB Interface: 3 x USB2.0. Internal Hard drive: 1 SATA Port, Up to 6TB. Recording Modes: Manual/Motion/Schedule/Recycle, Easily find and playback your security footage by searching a specific channel using date ...