◇ 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.
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