When your hands are full, dealing with the critical task at hand, 5.11 S+R headlamps provide you with performance-enhancing hands-free lighting solutions. Developed with input from seasoned Search and Rescue professionals to meet their requirements for dependability, simplicity, performance, and the use of common replacement batteries. Durable enough for rugged missions where dependable performance and exceptional output contribute to operational success. Powered by 3x AA batteries, readily available in most theaters, or the optional rechargeable NiMH battery pack. The adjustable elastic headband is sized to fit all heads and helmets and has reflective safety stitching. The overhead strap is removable and the entire strap is replaceable. The inclination angle can be adjusted from 0° to 90°. Water resistant construction. High and Low light modes.