JETBeam SS dual side-switch out door spirit series adopt a very convenient and easy dimming regular system--a round side switch and a triangle side switch which give you a clear idea about the light dimming. SSC20 is equipped with the latest Cree LED and powered by 1*18650 battery or 2*CR123 batteries with a max output of 580 lumens and runtime of 50 hours. It has multiple functions including three levels of brightness, strobe, low power warning, etc. The unique rotatable clip on the tail adds to its portability. JETBeam dual side-switch outdoor spirit series is you best choice for out door sports.