Operation voltagev37 modelh3 input voltage v5 materialmetal plastic typein ear general usemobile phone cellphone functionbluetooth with microphone communicationbluetooth connectorsusb memory capacitynone speaker sensitivitydb84 speaker frequency response20hz 20khz max input power5 driver typeelectrostatic sound channel20 bluetooth versionv41 operating rangem10 talk timehours7 standby time hours100 brandzealot listing date05312017 prod