Water resistant and lightweight with its thermoplastic construction, this Streamlight septor Headlamp utilizes seven LEDs and features 3 lighting modes. It includes a rubber hard hat strap and uses 3 AAA batteries. 1.86 inch face cap diameter, 2.55 inch max. Width, 2.53 inch max. Depth, weighs 4.72 oz, has 90 degree tilting head.