Operation voltagev37 modelm165 input voltage v110 220 materialpolycarbonate typeearhook general usesports fitness gaming computer mobile phone cellphone functionbluetooth noise cancelling sports gaming volume control with microphone communicationbluetooth connectorsusb memory capacitynone speaker sensitivitydb128 speaker frequency response20 2000hz microphone impedancekohm8 microphone frequency response20 2000hz driver typemoving iron sound channel51 blu