This head-mounted light boasts 1,000 lumens of power wide beam. It?s mounted on an adjustable head-strap which fits most head sizes and is powered by a rechargeable 18650 Li-ion battery. This head-mounted light boasts 1,000 lumens of power wide beam. It?s mounted on an adjustable head-strap which fits most head sizes and is powered by a rechargeable 18650 Li-ion battery.Details: 1000 lumens at 6500K color temperature Rechargeable Lithium-Ion 18650 battery allows for two hours of burn time on the highest setting Four power settings with a color-coded battery level indicator Anodized aluminum head and polycarbonate body for durabilityProduct Specifications Package Weight: 2 lbs Lumens: 1,000 Burn Time: 2 hrs (level IV), 4 hrs (level III), 8 hrs (level II), 20 hrs (level I) Light Source: Cree LED Power Source: Rechargeable Li-Ion 18650 Battery Color Temperature: 6500K (Cool White) Maximum Depth: 100 Meters Tested Weight: 250g (including battery) Buoyancy: -74g (including battery) Size: Dia. 36.8 x L. 84.4 mm with light head dia. 41mm Housing Material: Aluminum Alloy light head and Polycarbonate body