Sennheiser RS 185 Headband Wireless Headphones 505564 - Black Contents: Headphones, Receiver, Audio Cable, AC Adapter, Manual, Box. Used Tested Working - In Very Good Condition. Product Information These wireless Sennheiser RS 185 are headband headphones that feature a frequency response of 22 Hz - 17 kHz and 106 dB sensitivity, so that they deliver clear sound and great listening experience. In addition, they come in black and weigh 10.93 oz. Product Identifiers BrandSennheiserMPN505564ModelRS 185eBay Product ID (ePID)209697002 P