The Blackmagic Design Universal Videohub SDI Interface includes 4 SDI inputs and 4 SDI outputs, plus 4 deck control. Includes full re-clocking and auto switching SD, HD, and 3 Gb/s SDI. SDI interface cards also support 16 channels of embedded SDI audio, so all the audio channels in your signal are routed together with the video. For maximum flexibility, interface cards are all the same size and fit both Universal Videohub 72 and Universal Videohub 288, which is great if you need to use an alternative frame size in the future. The SDI interface connects all devices in a facility by covering long distances up to 300' (91.4m). It uses 10-bit video quantizing that allows 1024 video levels and eliminates banding and contouring problems in high-quality video.