Amazon.com: Sennheiser IE 300 in-Ear Audiophile Headphones - Sound Isolating with XWB Transducers for Balanced Sound, Detachable Cable with Flexible Ear Hooks, 2-Year Warranty (Black) : Electronics
Massdrop x Sennheiser PC37X Gaming Headset Noise-Cancelling Microphone with Over-Ear Open-Back Design, 10 ft Detachable Cable, and Velour Earpads,Black Headsets & Accessories - Newegg.com
Sennheiser HD 400S Closed Back, Around Ear Headphone with One-Button S – JG Superstore
Amazon.com: GEEKRIA Audio Cable Compatible with Sennheiser Momentum 3, Momentum 2, HD 400S, HD1, HD 4.50 SE, HD 450BT, HD 4.40, HD 4.30G Cable, 2.5mm Aux Replacement Stereo Cord (4 ft / 1.2m) : Electronics