SINREY SIP731V is a rack-mount playback terminal equipped with a 10/100M Ethernet interface. On the rear panel, it features a set of AUX audio input, a set of AXU audio output, and a 220V AC relay output directly connectable to a pure post-amplifier. This configuration enables the post-amplifier to play both network and local audio. Additionally, the terminal includes a 6.35mm interface for microphone input, three volume adjustment knobs, and a level indicator. These features cater to local amplification and volume adjustment needs.