Turn up the volume on your advertising efforts with this portable audio system! It features lightweight, amplified speakers that fold up so it can be taken pretty much everywhere. Simply plug in your device with the 3mm headphone jack that allows for surprisingly rich output and crank up the volume at your next event. A great promotional product for electronic stores, media companies, music festivals, and more, people will love to receive this customized system! Requires 4 AAA batteries (not included).