LED Lenser - M17R, Rechargeable Flashlight PERFORMANCE SPECS: max 850 lumens (min 120), max distance 450M (min 250M), max battery life 5H (min 36H), water resistance rating IPX4. ADVANCED FOCUS SYSTEM: The Advanced Focus System (AFS) is the patented combination of a reflector AND lens to create a light system that provides both a focused beam for long-distance and a homogenous spill-beam for up-close reading. SMART LIGHT TECHNOLOGY (ADVANCED): Advanced Smart Light Technology also offers two energy modes: Energy Saving mode optimizes burning life, and Constant Current mode features electronically controlled, continuous light output. RAPID FOCUS: With our Rapid Focus system you can go from reading to searching by using the thumb on your holding hand to simply slide the bezel away from you. With one hand and one movement, you can achieve seamless transition from close to far and all points in between. SAFETY YTRION CELL BATTERY: The wait is over for a rechargeable battery that takes safety, power and run time to a whole new level. The Safety Ytrion Cell battery from LED LENSER is the first flashlight battery to truly mimic the properties of the hybrid car battery  safe, long run times and the ability to recharge thousands of times without losing significant battery capacity.