The PowertraxPRO features unbeatable aluminum construction that stands up to the toughest conditions. This retractable bed cover features all the same great benefits of the RetraxPRO, but allows for hands-off operation via a wireless remote control. Once you have the PowertraxPRO installed, you'll never have to worry about your bed cover again. The PowertraxPRO locks in any position using an electromagnetic brake -- the perfect way to keep the contents of your box safe. Plus, it allows for unlimited flexibility in hauling almost any object. The retractable cover opens and closes easily with one hand thanks to its sealed-for-life bearings. There's no need for pull straps, Velcro, snaps or springs.