U-8,UHF PLL eight 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 range ,adopt ... tone lockedOperating distance : 60-100 meters 3)TRANSMITTER (Wireless conference microphone )Operating frequency :500-980MHzTransmitter power : H 10dBm ,L 5dBmCartridge ...