Modelbt072 cable lengthcm08 materialmetal plastic silicone typein ear general usesports fitness computer mobile phone cellphone functionbluetooth sports with microphone communicationbluetooth connectorsusb speaker diameter8mm speaker sensitivitydb108 speaker frequency response20hz 20000hz microphone unit1 microphone impedancekohm 58 microphone frequency response100hz 8000hz max input power3 driver typeelectret sound channel20 bluetooth versionv41 fr