Easy to use, Powerful Projecting LED Beam, 4 Selectable Modes, High Power, Low Power (25%), Blink Mode – Blinks approx. once a sec, SOS, "Spot-to-Flood" adjustable LED beam, Anodized for corrosion resistance and durability. Rugged, machined aluminum case, Compact design, Intelligent Energy Source Management – continuously monitors the balance between high brightness and efficient power usage allowing for prolonged battery life, Powered by two (2) AA alkaline batteries.