Sennheiser SC 45 USB MS (507083) - Single-Sided Business Headset | For Skype for Business, Mobile Phone, Tablet, Softphone, and PC | HD Sound and Noise-Cancelling Microphone (Black) (615104277366) - Newegg.com
Sennheiser HD569 Closed Around Ear WIRED Headphone 615104270978 | eBay