... channels wireless microphone(8*32channels),500-980MHz,distance :100M ,Tone-Lock MODEL: U-8, 8* ... 32 Channels Wireless Conference Microphone(ACT / IR )FEATURE :*use UHF 500-980MHz ... 3)TRANSMITTER (Wireless conference microphone )Operating frequency :500-980MHzTransmitter power : H 10dBm ,L 5dBmCartridge gain ... wireless microphone(8*32channels),500-980MHz,distance :100M ,Tone-Lock