... as IPHONE,IPAD,most computer,cellphones6.Frequency response:20-20,000Hz7.Speak Impedance:32 ohm8. ... next song4LED Indicator5Multifunction button (MFB): answer, end and reject call, pause and play6+ key: volume up7– key: volume ... off headset FunctionOperationLED indicatorIndication toneSwitch on Press and hold the MFB for 3 secondsBlue LED is ... stereo mobile headset support phone call and music