* Listening to music Play/Pause : press the button on L/R once in short Next Track: Press the button on L/R twice in short Previous Track: Press the button on L/R three times in short * Calling Answering a call/Ending a call: press the button on L/R once in short Rejecting a call: press the button on L/R once in short * When using Dual Mode, the sound can be heard from both left and right earphones during calls. * In Single Mode, each earphone will output sound with both microphones enabled for use. * Press and hold the multifunction button for 1 second to launch the voice recognition feature of your smartphone or tablet. (Android OS : Google Assistant / iOS : Siri / Window OS : Cortana - Except during calls)