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Product Description Accuracy and control. Accurate high-output sound and an in-line volume control to conveniently keep it in check – even when your portable player is stored away in your backpack or seat pocket. The new K 340 ear canal headphones feature outstanding frequency response and a handy hard case. Features In-line precision volume control Comfortable fit Carrying case included Best for portable DVD, CD and MP3 players iPhone® compatible Specifications Frequency range (Hz-kHz) 11.5-23 Input impedance (ohms) 16 Sensitivity (dB SPL/V) 122 Colour Fudge or Liquorice Headphones weight without cable (g) 3