The best of ups is the intex ups. It provide my computer protection from sudden shutdown that may destroy the program. In using the ups it also need the charge 12 hour countiniusely . It also give the very good low audible noise when used.It sound an alram whenever the electrycity goes out but there is no adjustment to the volume so it is quite a disturebance especially if you are working on late hour project.More user of this ups because it is very good.