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
Sennheiser Black HDR 170 Around-Ear Wireless Stereo Surround Sound Headphone (Charger/Transmitter not included) - Newegg.com
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Sennheiser HDR 170 Extra headset for RS 170 wireless headphone system at Crutchfield
Amazon.com: Geekria Protein Leather Headband Pad Compatible with Sennheiser RS160, RS170, RS220, RS185 Headphone Replacement Headband/Headband Cushion/Replacement Pad Repair Parts (Black) : Electronics