Save yourself the hassle, DO NOT BUY THIS.
Bought this for my wife, we had it for less than a month and the control unit shorted out while she was using it. According to her, it smelled like it was burning and stopped working so she unplugged it for about an hour and tried it again and it wouldn't turn back on. We have returned this one and will be purchasing a heating pad from a more reputable brand. I give it 2 stars because while it was working, it worked great, good heat output, even at a low setting. Unfortunately it's very low quality. Thank goodness for free returns.
Rating: 2 stars