I was excited to get this item, as I used to travel 400 miles every other weekend. I drive a MT car, and would have loved to be able to use this during my long commute, but when it arrived, it would not charge. :-( I contacted the seller for an exchange, and they wanted me to pay to return the defective item. After kindly pointing out that I had already paid for the item as listed, and to have it shipped, and that it would make no sense to have me pay to return the item to them, I received no further communication from the seller, but did receive an email from Amazon informing me that I had received a full refund for my item, so in the end, I never received a working unit, but I received a full refund for the defective item.