The Blackmagic Design ATEM SDI is a live production switcher designed for use with up to four converted SDI inputs. It features two SDI outputs as well as a USB webcam output - so you can use it with computer applications. A Fairlight audio mixer gives you high-quality sound with options for EQ and Dynamic - and there are two additional microphone inputs - ideal for interviews. The ATEM SDI is designed for ease of use with four numbered source selectors and at-hand controls for changing transition types and other visual features. It offers a range of different advanced features too including DVE for picture in picture transition effects green screen chroma key and a collection of 20 stills media pool. Included is a free ATEM Software Control download offering even deeper control and configuration from your computer.