Sennheiser RS 185 Digital Wireless Headphone System, NOB ———— Contents: Come with accessories in retail box. New Opened Box Condition. ————- Wireless, open, circumaural headphones with uncompressed digital audio transmission Exceptional digital audio clarity and transmission range of up to 328ft/100m (line of sight) High-performance Sennheiser transducers for precise, thrilling sound Control the sensitivity of your analog input – choose between Automatic Level Control (ALC) mode to even out volume differences automatically or Manual Level Cont