... to cotrol, 2.LCD dsplayer, 3. RS232/interface 485 4. 10W output every channel Multifunctional Timing Playback ControllerAn intelligent multifunctional playback ... input interfaces, an RS232 interface (interface 485), a two-channel 10W speaker output, as well as 3 group relay output switch ... dual-channel output, the adequate voice output, power up to 10W on each channel;6 Buttons for setting the clock and ...