Bluetooth connection wirelessly streams music via Bluetooth -enabled device up to 33"Works with most smartphones, tablets and Bluetooth -enabled devicesSpeakerphone with built-in microphone allows user to answer calls using iPhone or Bluetooth -enabled cell phoneBuilt-in rechargeable Li-Ion battery offers 4 6 hours of continuous playtimeVolume and hands-free phone controlsAUX-in for audio devices with 3.5mm audio jackDriver unit: 1 1/2" speaker3-watt total power output Includes 3.5mm audio cable and USB charge cable