Operation voltagev37v modelbq618 input voltage v5 cable lengthcm80cm materialplastic typeheadband general usemobile phone cellphone functionhi fi gaming volume control with microphone communicationwireless bluetooth memory capacitynone speaker diameter30mm speaker sensitivitydb80db speaker frequency response30 20000 hz max input power5v driver typeelectromagnetic sound channel20 bluetooth versionv30 operating rangem10m talk timehours20 stand