Sound Town Professional Dual-Channel UHF Headset Wireless Microphone System with LED Display, 2 Headset Mics, 2 Bodypack Transmitters (SWM10-U2BB) The Sound Town SWM10-U2BB combines stellar sound and ease of use into a sleek headset wireless microphone system while it doesn't break your bank. It comes with preset dual-channel UHF frequencies (540.9 MHz and 581.4 MHz) which are compliant with the FCC's new rules governing wireless systems. This helps minimize the chances of getting interference from other electronic equipment while you are performing. The two headset microphones together with two bodypack transmitters give you hands-free convenience. Built in audio compressing-expanding technology boosts dynamic range and delivers reliable, warm and smooth sound to your audience. The Sound Town SWM10-U2BB wireless system provides a great operation range up to 200 feet line-of-sight. Its two detachable antennas and quartz crystal oscillation stabilize frequency transmitting and receiving, so you can take the stage confidently. It is ideal for venues such as meeting rooms, auditoriums, stages, schools, places of worship, etc. You can rely on the Sound Town SWM10-U2BB for crisp sound quality and rock-solid, dependable performance.