What is a good (inexpensive) flat iron with auto shut off?

I'm leaving to do a semester at sea and am not allowed bring my CHI flat iron on board since it doesn't have an auto shut off. I'd prefer to not have to go three and a half months without a flat iron. I looked up on Amazon and saw the Andis Tourmaline Nano-Ceramic Clamp Flat Iron that has auto shut off but it didn't get great reviews. It's around $30 which is what I'm looking to spend.