The House of Marley EM-JA010-MI Bag of Riddim Bluetooth Portable Audio System NOW WITH BATTERY INCLUDED! Dual 4.5" Woofers, Bluetooth & 3.5mm Aux Input. USB Port for Charging External Devices, REWIND Fabric Bag. 4400 mAh Rechargeable Battery. Up to 8 Hours of Playback. Recharges Within Bag of Riddim