ELITE A/V Unit consists of 4 composite inputs, 4 SDI Inputs, 4 HDMI with 2 unswitched loop-outs, 4 composite outputs, 8 SDI outputs, and 4 HDMI Outputs, 1 RS-232 for control and 1 RS-232 for maintenance. Each of the inputs can be sent to any of the outputs. There are then 12 audio sources that can be fully configured and switched to 16 independent outputs with volume control if needed.