AAA batteries are clearly listed here, so I go to the store to buy, come home and the wrong size, as you can see. Go back to the store and buy AA batteries, two trips and two battery purchases later, let it run. It's pretty junk, the buttons are very hard to press under the fabric, the fabric stickers are peeling off, and it's very loud with no volume control at all. This allows you to record your voice and play it back at a very high pitch. I had high hopes that it would be fun, but if you can't even find the correct battery size on the box then it's most likely a poor quality product.