ATEM 1 M/E Constellation 4K is a powerful 1 M/E Ultra HD live production switcher. It features 10 standards converted 12G-SDI inputs, 6 12G-SDI aux outputs, DVE, 4 ATEM Advanced Keyers, a 16 way multiview, media players and USB webcam output. You even get built in talkback and a professional 28 channel Fairlight audio mixer with EQ and dynamics!