UAA provides Infrared assistive listening technology; a wireless system that transmits sound to a person’s receiver via invisible light beams. This is optimal for facilities operating several systems, in different rooms, simultaneously. Infrared technology is secure via an encrypted signal––ideal for applications where privacy is crucial. Unlike FM transmission and induction loop technology, infrared light cannot pass through walls. Each person uses an infrared receiver, including types such as the lightweight under the chin style, over the head, and neck loops.