The RS 135-9 continues the tradition of Sennheiser's wireless headphone premium selection using RF technology to give you the best performance in transmission range and sound. Using 900 mHz RF technology, RS 135-9 will operate up to 330 feet through walls and ceilings. Additionally, the headphone's open air design ensures excellent acoustic performance. The RS 135-9 wirelessly enhances your experience of listening to TV, movies or virtually any other audio source - without disturbing those around you.
