BUYER BEWARE ProMax 12V Automatic Battery Protection Priority Start... WARNING THE COMPANY MAKES NO WARRANTIES. Mine was a gift! It worked for a while but after 2 months it suddenly stopped working resulting in my car not starting at all. I took it off and my car started again... I called the company in Spokane, WA and they told me where to ship it. After receiving it they called me and said they needed a prescription to confirm the date of purchase. After all, they refused to replace or repair it. When I asked for it back I was told it had already been disposed of... After several attempts to resolve this issue via email he kept apologizing and saying there was nothing he could do. I asked to speak to the manager and the manager never answered.