This is an additional reciever for the EchoIR™ it can allow two people to use the EchoIR™ at the same time.Features:* Automatic signal control circuit adjusts any sudden volume increases to keep the output volume stable.* Balance control allows individual setting of balance for left and right ears.* Tone control, easy to adjust to individuals preferred setting.* Comfortable lightweight receiver only 55gms* Comfortable in the ear design soft ear buds to provide maximum amplification with maximum outside noise reduction.* Audio and microphone inputs on headset enable headset to be used as a personal listener without use of the transmitter.