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. SSA20 is equipped with US latest Cree G2 LED and powered by 2*AA batteries with a max output, 300 lumens and runtime, 90 hours. It has multiple functions including three levels of brightness, strobe, low power warning, etc. The engineers aim to make SSA20 the smallest, the brightest and the most portable one. 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.