Based on TCP/IP protocol. Support standard SIP. With background broadcasting, business broadcasting, emergency broadcasting and other functions. Built an independent IP control module and audio input module, independent decoding can be realized. Support energy saving mode (single channel model), when the audio signal is not input, the power amplifier can be used for standby energy saving. When there is a broadcast signal, the power amplifier can be turned on in advance. Support audio format: MP3, WAV.