4 Selectable Modes:-High Power-Low Power (25%)-Blink Mode - Blinks approximately once a sec-SOS  77 Lumen LED lamp with an adjustable spot to flood beam, and a max spot range of 462' / 141 m Rugged anodized aluminum alloy construction that is corrosion, impact, and weather resistant Compact, lightweight design Intelligent Energy Source Management - continuously adjusts the balance between brightness and power usage allowing for prolonged battery life