Rock N Jam Any Object can turn in to a speaker and play your tune. You can be jamming and rocking anywhere you like any time. Just plug your Rock N Jam Vibration speaker to your music source and the reusable stick plug to turn any object in to a speaker. Compatible with any music source with 3.5mm jack. Runs on 2 AA batteries (not included). Comes in multiple color choice. Speaker Size 3 inch x 3 inch x 3/4 inch thick. Runs on 2 AA batteries. Built in cable with 3.5mm jack to plug in music source.