Amazon.com: Sennheiser RS 170 Digital Wireless Headphones (Discontinued By Manufacturer) : Electronics
sennheiser surround sound wireless headphones T 60 | eBay
Amazon.com: Sennheiser Consumer Audio HDR 175 Accessory RF Wireless Headphone for RS 175 System : Electronics
Sennheiser RS 120-W On-Ear Wireless Headphones for Crystal-clear TV Listening with 3 Sound Modes, Lightweight Design, Easy Volume Control, 60 m Range and Convenient Transmitter/Charger Combo - Black - Walmart.com