This round, stylishly black, portable speaker by Harman Kardon offers true HiFi audio quality and an impressive RMS power handling capacity of 60 watts. With a TRS audio jack socket, you can connect a wide variety of audio devices. In addition, the onyx Studio 3 is Bluetooth enabled and has a built-in microphone so that you can use it wirelessly for music, or for hands free-calls via your smartphone.