The TLR2S weapon light is powered by two 3-volt CR123A lithium batteries with a 10 year storage life. Featuring LED technology and a blinding beamof (160 lumens) with Optimum peripheral illumination that will not break or burn out. The LED is shockproof and if good for 50,000 hours lifetime.There is up to 2.5 hours run time or 45 + hours with laser only. The Strobe is user programmable.