Contents .. Denon dn-HP700 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 Open, Dynamic Driver Size 40mm neodynium Frequency Response 10~30,000 Hz Sensitivity 100dB/mW Impedance 38ohm Output 1,700mW Cord Length, Shape 1.2~3m Left coiled Weight ?g Weight in Retail box 700g