Suunto Sonic has three buttons you can use to switch song, adjust volume and answer or end phone calls.
press the multifunction button once to start or stop playing the audio
press the multifunction button twice to skip to the next track
press the multifunction button three times to return to the previous track
press the
button to increase volumepress the
button to decrease volumekeep the multifunction button and the
button pressed simultaneously for 3 seconds to switch sound modepress the multifunction button once to answer or end a call
press the
button to increase volumepress the
button to decrease volumekeep the
and buttons pressed simultaneously for 3 seconds to enter pairing modein pairing mode, keep the multifunction button and the
button pressed simultaneously for 3 seconds to enable dual device connection