* Aerospace-grade aluminum head with the lid of tailcap * Rugged aerospace-grade aluminum body, Type III hardest anodizing in black * O-ring sealed, waterproof in 1 meter deep water above and weatherproof * Toughened ultra clear glass lens * Aluminum reflector for a flawless beam * Li-ion battery discharge protected * Wrong polarity of battery inset protected * CREE XP-G R5 LED with lifespan of 100,000 hours * Three output types:High->Low >Strobe