MEE audio M-Duo Dual Dynamic Driver In-Ear Headphone with Inline Mic and Remote - Blue (Certified Refurbished) This Certified Refurbished product is tested and certified to look and work like new. The refurbishing process includes functionality testing, basic cleaning, inspection, and repackaging. The resulting product includes all relevant accessories, comes with a minimum 90-day warranty, and may arrive in a generic box. Only sellers who meet a high performance bar may offer Certified Refurbished products on Amazon.com Dual driver design with separate subwoofer for deep, impactful bass with clean vocals and clear instruments Integrated microphone and remote for calls and media control on smartphones, tablets, and more In-Ear design provides noise isolation and comfort for extended use Stylish and durable metal construction looks as good as it sounds