Suppression of low-frequency resonance Avoid standing wave DUAL Anti-Standing Wave System   24k gold plated plug		Contents .. 9w NW-Studio Pro Earphones Earphones Cushion 2 pairs Stereo plug adaptor Pouch Supplied by Authorized Resellers in Japan. 1 year Japan Warranty from the day we sent your parcel. We can help you liaise with the maker in Japan. You will pay for postages to/from our Japan office. Singapore and Malaysia buyers can bring/post to us locally. We will deliver FREE to/from Japan. Return postage chargeable.   Type Close Dynamic Driver size 13.5 mm Frequency Response 20~20,000 Hz Sensitivity 110 dB/mW Impedance 32 ohm Cord Length, Shape 1m, Y Weight 12g Weight in Retail box 70g