Audio-Technica ATH-M30x Professional Studio Monitor Headphones (Certified Refurbished) This Certified Refurbished product is manufacturer refurbished, shows limited or no wear, and includes all original accessories plus a 90-day warranty Advanced build quality and engineering, Tuned for enhanced detail, with excellent mid-range definition 40 mm drivers with rare earth magnets and copper-clad aluminum wire voice coils Collapsible for space-saving portability Designed to excel for studio tracking, mixing, and field recording