Featuresr 153g lightweight compact and exquisite design easy to carry withr sweat resistant meet ergonomics design comfortable to wear for a long timer bluetooth 40 powerful signalr apt x digital technology crystal clear natural music sound noise reductionr built in microphone keys to control power off onpairing lastnext song vol r anwserendrefuse mute vol pauseplay lastnext songr magnetic design when you don39t need it the 2 tops can wind around you neck n