At the time I purchased the item the advertisement said, "Runs on 3 aaa batteries( not included)". However, when I received the item I found it ran on button cell batteries. I was told I would be refunded all my cost. They only refunded my original shipping + product cost, I had to pay to ship it back (even though I'm not the one who made the mistake). Some one either lied to me or made yet another mistake. Yet another online rip-off.