ATEM SDI is a family of live production switchers designed for broadcasters who need extreme portability! ATEM SDI switchers are very similar to ATEM Mini, however the video connections are 3G-SDI and each model has double the number of video outputs! You get 4 SDI inputs on the ATEM SDI and ATEM SDI Pro ISO models and 8 SDI inputs on the ATEM SDI Extreme ISO model. Plus all SDI inputs feature standards converters and re-sync! You even get DVEs for picture in picture effects! The USB works as a webcam for connecting video to computers, while the Pro and Extreme models feature built in streaming. For audio the Fairlight mixer includes a compressor, limiter and 6 band parametric EQ on each input!