TriPort Acoustic Headphone Structure
TriPort® acoustic headphone structure Proprietary Bose® technology produces a rich balanced audio performance. The unique TriPort® acoustic headphone structure provides excellent low-frequency output and helps create a wide range of audio from such small, lightweight earphones and earcups. There's no need to push buttons or adjust knobs, and no batteries are required. You just plug in and experience full-bodied, well-balanced audio that brings out the details in your music.