The PartnerMic is discreet and easy-to-use. This remote microphone allows for optimal one-to-one conversations in noisy environments. Attach it anywhere on your companion's shirt or jacket, ideally 8 inches below their mouth. Speech is streamed up to 80 feet to your hearing aids. Alternative use by placing flat on a table or in front of a sound source such as a TV. The transmission distance can be reduced if the signal is blocked by obstacles (walls, furniture). The Easy Line PartnerMic is compatible with Phonak, Unitron, and Relate hearing aids. Please consult with your hearing healthcare provider prior to purchase to verify compatibility.