The 2 M/E model has 20 SDI  inputs and 12 Outputs. Each SDI input features a full standards converter! ATEM Constellation includes advanced features such as DVEs, ATEM advanced chroma keyers, media players, multiviews, and SuperSource processors! Plus the built in Fairlight audio mixer includes a compressor, limiter, 6 band parametric EQ and expander on each input.