The Portable Infrared Underchin Receiver is a two channel under-the-chin receiver, compatible with our transmitters using frequencies 2.3MHz and 2.8MHz. The receiver is easy-to-use, comfortable and can switch between mono and stereo. Its earpieces swivel, meaning they keep their position in the ear even when a user turns his/her head. It utilises rechargeable batteries. Volume is amplified, adjustable up to 120dB to assist users with hearing loss. Spare rubber earbuds are available if required.