The HB70 Infrared (line of sight) Stereophone system consists of a single channel wireless stereophone and a compact infrared transmitter. Incorporating infrared technology, the HB70 is ideal for home audio, video and computer use. The transmitter connects to most home systems through a 3.5mm headphone jack or audio output. Utilizing infrared (IR) technology, it transmits an invisible, infrared signal to the headphone which then reproduces the audio signal. Unlike conventional wireless systems the HB70 is relatively small and lightweight for extended listening periods.