Started digging through a junk drawer looking for a computer cable to replace the one that came with it. I shouldn't have done that. Free connection? Straight out of the box? It knocks off a few stars. Made in China. Not UL approved. The rest - it works. It fed my large 12 volt Coleman cooler and brought it down to 36 degrees Fahrenheit in about an hour. So I'll keep it. Delivery was quick and without damage. Note: The device says "For use with information appliances only." Revain paired it with Coleman coolers in a "commonly-bought-together window". Coleman may not honor your warranty. So don't tell them anything if you have a problem.