IR16 adopts high quality digital audio transmission of network audio module to transmit signal. With a microphone,3.2 inch ,TFT65000color screen,humanized interface,1 external interface, built in bell generator.built in 3w digital amplifier,high fidelity. Magic sound function, multicast,unicast ,paging partition intercom functions.digital audio transmission without noise.functions of speaker and broadcast receiving,local volume adjustment,aided audio output,external power extend.Intercom function,function of testing the room speaker.unicast,dual ways intercom, multicast outage, function of restart after blackout,the restarted time is less than 3 seconds. Network interface: standard RJ45. Protocol:TCP/IP,UDP,IGMP(multicast) audio format:MP3. sample:8-48KHz.transmission speed:100Mbps.audio mode:16 stereo,CD acoustic.