Many design improvements over WM5, but technically the same as WM5. Changeable Earcup caps Each color choice comes with 3 pairs of color caps. Black: Red, Blue, Yellow Red: Green, Brown, Cyan White: Lime Green, Violet, Gray L shape plug tucks in better when the cord is fully retracted.   Common features with WM5 Winding Mechanism retracts the cord .. no more tangled mess! Flat foldable

Contents .. Audio-Technica ath-WM55 Headphones Color caps 3 pairs Plate change tool Supplied by Authorized Resellers in Japan. Japan Warranty 1 year on labor & parts from the day we sent your parcel. We can help you liaise with the Japan repair centre. You will pay for postages to/from our Japan office, and within Japan.   Type Close, Dynamic Driver Size 30mm Frequency Response 10~23,000 Hz Sensitivity 108dB/mW Impedance 20ohm Output 500mW Cord Length, Shape 1m Left retractable Weight 90g Weight in Retail box 150g Stock Earpads HP-WM55