Circle U-4 4 Channel Wireless Microphone Unit with Handheld
It has an anti-mobile interference technology, to minimize any interference from mobile phones and it also has built-in noise & tone lock technology to avoid interference. Operating distance approximately 70-100 meters with a real time battery level indicator and real time rf and af indicator.
Circle U-4 Receiver
Opearting Frequencies: between 500 to 980 MHz
Operating Range: 70-100 meters under typical conditions
Audio Frequency Response: 45 to 15,000 Hz +/- 4dB
Transmitter RF Output Power: 10 mW typical
Audio Output Connector: XLR balanced and 1/4" unbalanced