Hi friend I am going to share my personal review to the use full less product. Some day ago I bought the USP and connect my DELL computer. That day first I connected to my computer and cut the current supply and that would not able to constant 10 to 15 minute. I call the seals man and told my problem he said to me at-first you charge the USP and I charged the USP and the another day when current was gone the USP constant the computer 20 minute and before 20 minute the computer was shut-down. the another I call the seals man and the seals man give me excuse and told I can’t help you and some day’s after I call the help line number and that process I will not satisfied. The style and design is very disgusting.