The Sneaker Speaker is a really cute and well made portable speaker. The Sneaker Speaker is designed just like a cute sneaker and works just like a speaker. A 3.5mm audio jack is included in the purchase. To use, simply plug in the audio jack to a device like your laptop, cellphone, or your MP3 Players. 2x AA batteries are needed to power the Sneaker Speaker. AA batteries are not included in the purchase. Please check out the photos to learn more!