In ear headphones earhook headphones type of fitting in ear transmission mode wired features gold plated jacks headset compatible with android windows phone blackberry ios music function volume call functions answer call end call sound function in line volume control sound mode stereo button position on cable impedance 16 ohm frequency response 20 23000 hz max power handling 200 mw driver 85 mm number of drivers 1 length of cable 12 m typ