In ear headphones series philips she type of fitting in ear transmission mode wired features microphone call function answer call sound function passive noise reduction sound type powerful bass sound mode stereo sensitivity 105 dbmw impedance 16 ohm frequency response 11 22000 hz max power handling 20 mw driver 86 mm number of drivers 1 membrane pet magnet type neodymium voice coil copper length of cable 12 m types of cable straigh