Sennheiser RS 165 Headband Wireless Headphones - Black 505562 NOB Contents: Come with all accessories in retail box. New Opened Box Condition. Description Allowing you to listen to your movies or music wirelessly without bothering others, the RS 165 Digital Wireless Headphone System from Sennheiser operates on the 2.4 GHz band and provides up to a 98 range of operation. The RS 165 headphones have a selectable bass boost for the more pronounced low end, while the transmitter can support up to 2 pairs of headphones at once, with the second pai