... . Andriod Phone to cotrol, 2.LCD dsplayer, 3. RS232/interface 485 4. 10W output every channel Multifunctional Timing Playback ControllerAn ... on / off. With 11 trigger input interfaces, an RS232 interface (interface 485), a two-channel 10W speaker output, as well as ... timing polling feature, smart phone or RS232 / 485 communication interface flexibility to control the output port ON/OFF status, voice ...