Sony MDRV55/BR DJ-Style On-the-ear Headband Headphones Swivel Design, Deep Bass with Neodymium Magnets & 40mm Drivers, Black/Red (Certified Refurbished) This Certified Refurbished product has been tested and certified to work like new, with minimal signs of wear, by a specialized third-party seller approved by Amazon. The product is backed by a minimum 90-day warranty and may arrive in a generic brown or white box. Accessories may be generic and not directly from the manufacturer. Slim, folding DJ-style headphones. Includes Headphones & Operating Instructions. Comes in Brown Box Packaging Reversible headphones with earcups that are ideal for listening flexibility and easy portability Rugged, flat Y-type design is tangle free and easy to use Neodymium magnets provide a rich bass and a clear mid-range response. Closed-type driver units. 40mm driver. Frequency response: 5-25,000Hz