The AudioPressBox APB-008 IW-EX is a professional press box (Audio Splitter) expander featuring 8 Line/MIC outputs designed for system integrators for fixed installation. The IW stands for IN WALL as it is for flush mounting. Outputs are divided to channel A and channel B so it can also be used for bilingual conferences. Each Output is independet transformer balanced and isolated. It has 2 inputs with 3-pin phoenix connectors, one for each Output channel. You can route each Input to Output Channel A or B or both via jumpers.