Fenix TK15 S2 Flashlight LED blasts a max 337 lumens (1.9 hrs runtime) on turbo over 229 yards and 5 lumens (142 hrs runtime) on low for upclose lighting Includes 3 lighting modes and 2 strobe modes operated by new side dimmer button Tactical push button tail cap switch provides momentary operation when pushed half way Body Size: 6" (Length) x 1" (Diameter); 3 ounces; Waterproof to IPX-8 Standard Powered by two 3V CR123A Lithium batteries or one 18650 Li-ion battery