There are 8 channels of 485 communication signal input, which can be connected to 128 remote paging microphones; 2 channels of 485 communication signal output, connected to the broadcast control host, which can be used for DVD players, radio players, MP3 players, power managers, Equipped with power zone control and matrix zone control selection; 2 audio signal output; 2U standard chassis design, aluminum alloy panel, beautiful and practical. Cabinet size 485 * 88 * 340mm, power consumption is 15W