This Intrinsically Safe Class I, II, and III / Division 1 Spot Headlamp is designed for hazardous locations, where explosion risk due to fine dust or fumes is high. This headlamp is designed to deliver an optimal combination of lightweight, IP rated waterproof and dust proof rugged construction. Powered by 3 x AAA batteries, this intrinsically safe LED headlamp mounts directly on front or back accessory mounts found exclusively on Klein® Hard Hats and Safety Helmets no strap needed Please consult your safety supervisor before using this product.