◇ 四六级考试主备转换器，双路输入，自动识别故障，精准转换

      English exam main and backup converters, dual input, automatic error detection, precise conversion.

◇ 自动检测网络终端故障，自动检测主线路音频信号是否正常

      Automatically detect network terminal failure and perform main line audio signal status checking.

◇ 检测方式可设定，时间和灵敏度可调，触发条件可修改

      Detection mode can be set, time and sensitivity can be adjusted, trigger conditions can be modified.

◇ 全部音频隔离，避免多房间网络终端带来的地线噪音，不改变原有设备

      All audio sources are isolated, avoiding ground noise caused by multi-room network terminals

◇ 高电平备用信号变压传输，声音隔离多房间输送，降低成本

      High-level backup signal transformer transmission, sound is isolated in transmission.

◇ 可外接功放信号，断电自动切换

      Can be connected to the power amplifier signal, auto switch when power is off..

◇ 内置2X50W双声道功放，可连接4只教学音箱

      Built-in 2X50W dual channel amplifier, can connect 4 teaching speakers.