Sennheiser Adidas CX 680i Earfin Sports Headset (Certified Refurbished) This Certified Refurbished product is manufacturer 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 Smart remote with mic: enhanced usability for the latest models of iPod, iPhone and iPad. Sweat and water resistant. EarFin holding system: secure and comfort fit during workout. High output drivers: energizing sound.