Featuresr sport type back hang on ear designr equipped with high grade csr bluetooth v30 chipsetr intelligent built in microphone and speakerr low power consumption and support hands free functionr superb bass and stereo model r meet the ergonomics design perfect constructionr soft comfortable silicone earmuffs for long wearr mini foldable pocket size easy to carryr easily control playingpausing adjusting the volume previousnext songs answeringrejectingending an incoming call