The xenon lamp is powered by 4 AA alkaline cells (included) for a bright beam that penetrates thick smoke, fog, and dust. 6 /2 L Yellow 4 AA Alkaline (Included) Lexan EXL Resin body Class I, Div. 2; Gp ABCD, T3C; Class ll; Div. 2; Gp G, T3A, GP.D, CL.I, Zone , GP. IIA OPERATING TEMP. CLASS T3 CONFORMS TO STD. UL 783 Energizer E9 only approvals StealthLite 2400 Flashlight comes with a unique easy slide thumb switch that is easy to operate, even with gloves, popular with firefighters and adventure seekers."