Small Area Stereo IR System, Neckloop RX, 2.3 MHz/2.8 MHz MSRP: $199.00 The WIR 239 delivers audio from a TV, stereo or audio output by infrared signal to a listener wearing a telecoil equipped hearing aid. The system reduces background noise, overcomes distance from the sound source, and improves the overall listening experience. It includes an adjustable volume control so the listener can listen to the audio program at the volume of their comfort level.