Now you are free to work the room to your heart's content, without the hassle and restriction of cables underfoot. Highest-quality sound is provided by the ULM300MIC’s customdesigned microphone capsule that is optimized for vocal performance, and the built-in transmitter that operates in the license-free 2.4 GHz range. Interference-Free Performance Our state-of-the-art transmitter operates in the 2.4 GHz frequency band, which is well out of the way of TV stations and cell phone towers. And since it is digitally encrypted, your signal gets through in all its pristine, high-definition quality, without the random artifacts that often plague other wireless systems. The ULM300RD dual-channel receiver tracks your every move, with a range of up to 200 feet (60 m). Extended Battery Life Replacing batteries in wireless mics can get expensive really fast – and having them die in the middle of your set can be a real showstopper! You get an honest 24 hours of performance time from a pair of AA alkaline batteries, which are available virtually anywhere on the planet. Easy To Use Setup couldn’t be easier, because the ULM300M mics automatically pair with the ULM300RD dual-channel receiver – without you having to lift a finger. Convenient front-panel LEDs on the receiver show your signal presence and strength, while indicators on the transmitter let you know at a glance when it's time to change batteries. Audio outputs are balanced XLR and unbalanced 1/4" TS, allowing you to connect to PA and conference room systems or high-quality instrument amplifiers.