Replacement Ear Pads for Sennheiser RS110 RS160 RS170 RS180 HDR160 HDR170 HDR180 Headset Parts Earmuff Cover Cushion Cups - AliExpress
Sennheiser RS 110 Over-Ear Headphones, Open Cup, Volume Control with 6.3 mm (1/4") Stereo Adapter, AC Power Adapter, Transmitter Unit, 2 AAA batteries, Black, Silver, 009917 - Walmart.com
Casque Sennheiser RS 110 | agatzeblues | Flickr
Sennheiser RS 110 Wireless Headphone System Manual | HiFi Engine