iLuv iBT100 Stereo Dongle for 3.5mm Jack Device (Black) Wirelessly streams audio to Bluetooth-enabled headphones, speakers and more Compatible with any device equipped with a 3.5mm input Built-in Li-Poly rechargeable battery Standby time up to 70 hours, Continuous playing time up to 5.5 hours Includes USB charging cable to charge the unit using your computer or any USB AC charger