Main Features: ??Pen-shape appearance design for easy carrying ??CREE LED for 10000h long lifespan and high bright ??High-quality aviation-grade aluminum T6061 material shell for 3m impact resistance ??Waterproof design for a wide application, such as searching, patrolling, daily carrying, protection, detective, night fishing, camping, hiking, and so on ?? Press switch for one-handed operation ?? Powered by 2 x AAA battery ( batteries are not included ) ?? Working voltage: 0.8V - 3.7V