The Streamlight Stinger DS LED features dual switch technology allowing you to access any of the three variable lighting modes and strobe via the tail cap or the head-mounted switch. The deep-dish parabolic reflector produces a long-range targeting beam w/ optimum peripheral illumination. Optimized electronics provide regulated intensity. TheRechargeable Batterycan be recharged up to 1000 times. The combination of a rechargeable battery and a lifetime super high flux LED results in the lowest operating cost of any flashlight made.