Features * enhanced audibility of distinct tones for a truer audio representation * reduced distortion resulting from overamplification * lower non-linear distortion * reduced frequency response variability * improved frequency response * small electronic enhancer pack * comfortable, lightweight and easy storage * built-in selector switch for portable audio or airline use * audio play-through with or without noise reduction Specifications * frequency range: 20 - 20000Hz * active cancellation: 20 - 1500Hz, better than 15dB between 150 - 300Hz at max. cancellation * cable length: 80cm (one sided cable) * power supply: 2 x 1.5V AAA batteries (lasts about 100 hours) * 3.5mm plugs

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