The Ledlenser H5 CORE Headlamp is compact and features a dimming function. It has 3 brightness levels - Boost (350 lm), Power (200 lm) and Low Power (15 lm). The headlamp features the patented Advanced Focusing System, which enables seamless beam focusing for flood (near) or spot (distance) illumination and any level in-between. The head can be pivoted to angle the light up or down, within 160deg;. Seal-Tight technology provides a supreme level of ingress protection to IP67 and ensures the torch is 100% dust-tight and watertight against the effects of immersion between 15cm and 1m for up to 30 minutes. The head strap is made from anti-microbial material to help inhibit the growth of harmful micro-organisms. Additionally, the adjustable head strap can be detached for washing. This headlamp is powered by alkaline batteries (supplied). It features a low battery warning which allows the user time to replace the battery before the power runs out. Supplied with 2 x AA alkaline batteries.