Headband headphones series vivanco aircoustic type of fitting over ear transmission mode wired features in line control music function volume sound mode stereo sensitivity 108 dbmw impedance 32 ohm frequency response 20 20000 hz max power handling 30 mw driver 40 mm number of drivers 1 length of cable 5 m types of cable single sided straight cable jack 35 mm jack shape straight colour black material plastic earcup material syntheti