Audio Technica engineers have designed the 3000 Series wireless system with many professional features to ensure a great performance and extreme reliability. Loaded with 200 frequencies, this wireless is certain to work anywhere and everytime — even under the most strenuous conditions. Both handheld and beltpack transmitters have an amazing dynamic range with no audio distortion and produces clean and detailed sound. The 3000 Series receiver has an impressive signal to noise ratio with strong RF (radio frequency) protection so all you get is great sound all the time.