For those who say its not working, you have to press the big rubber thing which is a button on the light its self, if not turned on then charge it. reason why its 3 star is because the instruction manual is very poor, does not tell you that thing is a button nor tells you the press there at all, next every time it flases it sounds like a loud alarm clock beeping, that would be so embarrassing and making people think im beeping at them, no way i want that. the product does not mention it will beep when it flashes and the rubber peices seem to get loose rather easy. good thing about this now is, very fast charging, very bright, looks good.