Sennheiser Black HDR 170 Around-Ear Wireless Stereo Surround Sound Headphone (Charger/Transmitter not included) - Newegg.com
FS: Sennheiser RS170 Wireless Headphones for Home Theatre TV New W/ Extra Headset - Stereo, Home Cinema, Headphones Components - StereoNET International
Sennheiser Rs 170 for sale | eBay
Sennheiser HDR 170 Headband Wireless Headphones - Black for sale online | eBay