Operation voltagev30 42 modelufo input voltage v5 cable lengthcm0 typeearhook general usemobile phone cellphone functionbluetooth communicationwireless bluetooth speaker diameter10mm speaker sensitivitydb1009 speaker frequency response25khz microphone unit1 microphone spl 92 microphone impedancekohm200 microphone frequency response100 10k max input power148 frequency2402 2480 transmitting power 64 operating rangem10 talk timehours8