A professional passive press box (Audio Splitter) expander featuring 8 MIC outputs designed for system integrators for fixed installation. The OW stands for ON WALL as it is for surface mounting. Each Output is independent transformer balanced and isolated. It has 1 LINE input (3-pin phoenix connector). It has 1 Link output (3-pin phoenix connector) to connect more APB-P008 OW/IW in a daisy chain.