GreatLite EXPE65 Tactical Series E65 LED Flashlight Aircraft-grade aluminum with stainless steel protective ring Adjusts to 5 Light Modes: 70 Lumens, 250 Lumens, 500 Lumens, Flash and SOS Waterproof and Impact Resistant 2 Hours of continuous runtime at 500 lumens (maximum output) Beam distance up to 300 meters Aircraft-grade aluminum with stainless steel protective ring Waterproof and Impact Resistant 2 Hours of continuous runtime at 500 lumens (maximum output) Beam distance up to 300 meters