Sennheiser OCX 685i Adidas Sports In-Ear Headphones - Black (Certified Refurbished) This Certified Refurbished product is factory refurbished, shows limited or no wear, and includes all original accessories plus a 90 day warranty Ear sleeves have been replaced and are brand new. Therefore these headphones/headsets have been specifically designed and tested to sound good and to stay comfortable, secure and reliable throughout the course of their activity. Any 3.5 mm headphone socket on mobile or home audio devices These sports afficianados listen to their headphones/headsets during their sports activities in order to motivate themselves further. 3.5 mm angled plug