Amazon.com: SENNHEISER HD 4.40 Around Ear Bluetooth Wireless Headphones - Black
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
AC/DC Power Adapter Charger For Sennheiser RS 110 II TR 110 Wireless Headphone | eBay