pro audio

1. Screen is smart, clear2. Operates clear3. Can transmitted 2 sounds one time:MIC&LINE. MIC: fire alarm  broadcast telephone broadcastlong distance calllocal callelectronic auto bell.LINE:one of 6 ways background music, can change.4. Powerful functions of broadcast matrix partition, 5. Has one player, the background music can last one week. Can set the   program according to the client.