报警强行选择任意选通4路输入/16路输出4路背景音乐输入/1路报警寻呼功放输入参考数据：Input:In a:Background musicIn b:AlarmAlarm out :Short circuitFrequency Response :60Hz～15KHz(-3dB)Fuse:1APower Source:AC220V±10%/50～60Hz < 10vaDimensions:89mm*483mm*340mm