In ear headphones earhook headphones noise cancelling headphones series trevi js type of fitting in ear transmission mode wired features microphone call functions answer call reject call sound function active noise reduction impedance 16 ohm frequency response 20 20000 hz max power handling 15 mw length of cable 12 m types of cable flat cable double sided jack 35 mm colour red material plastic microphone position on cable weight 12 g in