Rechargeable USB headlamp with high performance. Compact and extremely lightweight. The USB headlamp Double Clutch™ is equipped with "Dual Fuel" technology, allowing it to be powered by a USB lithium-polymer battery or AAA batteries. It features a bundled or dispersed beam and high or low brightness modes. The USB headlamp Double Clutch™ has been specifically designed to optimize runtime and minimize weight, with an optimized design and center of gravity for maximum comfort and better stability during use. It allows for mode selection through a simple rotation. Diameter of the facet: 4.4 cm. Width: 6.35 cm. Depth (including the headband plate): 4.2 cm. Weight: 113 g. Waterproof IPX4. Shock resistance tested up to 1 meter. Power supply: rechargeable lithium-polymer battery via USB or 3 AAA alkaline batteries. The lithium-polymer battery can be charged both in the lamp itself and in the case, allowing the user to use the lamp with batteries while the battery is charging. The headlamp comes with an elastic strap, a rubber helmet strap, and a USB charging cable.