this flashlight do everything except be a flashlight . not sure how the switch be make , but if the light be bang or bump the light turn to the next mode which include SOS or dim , etc. . please just turn on and stay on , and it doesnt do that . buy two , never again , return one , need to get rid of the other . steer clear of this junk , this light make you want to smash it it be so annoying use it for work and it bump and start blinking .