ULTRA-POWERFUL: Delivers 1100 lumens in Boost mode; features 5 lighting modes to adapt to every situation, from close-range map reading to long-distance spotting. FACE2FACE ANTI-GLARE: Patented sensor detects other DUO headlamps and automatically dims the light when facing a team member, preventing blinding and improving group safety. RECHARGEABLE PERFORMANCE: Includes the ACCU 2 Lithium-Ion battery (3200 mAh, 7.4V); provides balanced weight distribution on the head and reliable performance in cold conditions. RUGGED DURABILITY: Waterproof (IP67) up to -1 meter for 30 minutes in fresh water; excellent resistance to falls, impacts, and crushing. EASY OPERATION: Large rotary knob is easy to manipulate even while wearing thick gloves; automatically switches to reserve mode when battery is low.