The Sound Town SWM10-U2HH combines stellar sound and ease of use into a sleek handheld wireless microphone system while it doesn t break your bank. It comes with preset Dual-Channel UHF frequencies 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 handheld wireless microphones employ the cardioid pickup pattern which yields superb sound feedback and Isolates noises in the background. Built-in audio compressing-expanding technology boosts the dynamic range and delivers reliable warm and smooth sound to your audience.