Anodized aluminum construction with non-slip rubberized comfort grip 3 Lighting modes and strobe High for maximum illumination: 800 lumens; 24,000 candela; 310m beam; runs 1.5 hours Medium for intense brightness and longer run time: 400 lumens; 12,000 candela; 219m beam; 2.5 hours Low for extended run time: 200 lumens; 6,000 candela; 155m beam; runs 5 hours 50,000 hour lifetime Optimized electronics provide regulated intensity throughout battery charge NiMH battery rechargeable up to 1000 times; also accepts NiCd battery Anodized aluminum construction with non-slip rubberized comfort grip IPX4 water resistant and 1-meter impact resistance tested