The combination of Brighter C4 LED technology, rechargeable batteries and 3 output levels plus tactical strobe results in one of the lowest operating costs of any flashlight made. Multi-function On/Off push-button switch lets you choose three lighting modes and strobe; designed for extremely long life; tested at 1 million actuations C4 LEDtechnology, impervious to shock with a 50,000 hour lifetime Three light modes and strobe Deep-dish parabolic reflector produces a concentrated beam with optimum peripheral illumination Unbreakable polycarbonate lens with scratch-resistant coating 3-cell, 3.6 Volt Ni-Cd sub-C battery stick; rechargeable up to 1000 times. Compact, snap-in charger mounts in any position Three Charger Options LED Charge-continuity indicator on charger base Regulated run time provides consistent performance throughout battery life Machined aircraft aluminum body with non-slip rubberized comfort grip IPX4 water-resistant; 1 meter impact resistance tested Anti-roll rubber ring included Serialized for positive identification Limited lifetime warranty