Difficult to rate this article which, in itself, is perfect and deserves 5; in my case, alas, it is zero. If you buy a UPS, pay attention to its inputs. The one I purchased from Amazon.com that day demand made round male, classic in France, two blades and a female pin (ie two male pins and a hole!). I got trapped by purchasing a plug-shaped extension to a kind of trapezoid-rectangle that does not match. It was proposed by mistake with the UPS ... Valeroger