DUAL SWITCH TECHNOLOGY with both tail cap and head mounted switches. They operate independently for maximum versatility. Lighting Modes: High for maximum illumination: 800 lumens; 310m beam; runs 1.5 hours; 24,000 candela Medium for intense brightness and longer run time: 400 lumens; 219m beam; 2.5 hours; 12,000 candela Low for extended run time: 200 lumens; 155m beam; runs 5 hours; 6,000 candela Strobe for signaling or disorienting: runs 3 hours Deep-dish parabolic reflector produces a concentrated beam with optimum peripheral illumination Optimized electronics provide regulated intensity throughout battery charge 3-cell, 3.6 Volt Ni-MH sub-C battery, rechargeable up to 1,000 times Charging: Steady charger: Fully recharges within 16 hours Smart charger: Fully recharges within 4.5 hours (5V/1A USB input) or 3 hours (12V DC input) Smart PiggyBack® charger: Fully recharges within 7.5 hours (5V/1A USB input) or 4 hours (12V DC input) Machined aircraft aluminum body with non-slip rubberized comfort grip; anti-roll rubber ring included IPX4 water-resistant; 1 meter impact resistance tested Unbreakable polycarbonate lens with scratch-resistant coating LED technology, impervious to shock with a 50,000 hour lifetime 8.85” (22.48 cm); 12.8 oz (364g) Serialized for positive identification Limited lifetime warranty