The powerful and versatile Coast HL77R LED Headlamp will meet your needs on the job, on outdoor adventures, or around the house. You have options for beam shape, power source, brightness level, and light color, all in a weather-resistant design with a rear-mounted battery pack and an overhead strap for support and comfort. The HL77R is powered by a Coast Zithion-X Li-ion battery that delivers a runtime ranging from 2.8 to 38 hours, depending on output levels used. If recharging isn't an option, the lamp can run on three AAA batteries (included). Output ranges from 22 to 500 lumens, with high and low presets plus Variable Light Control technology, so you can dial in just the right amount of illumination. A red light setting provides calm light that won't disrupt your night-acclimated vision, or disturb tent-mates if you need to get up in the middle of the night. Twist the lamp's bezel to alternate between Coast's Ultra View flood beam and Bull's-Eye spot beam. Inclement weather poses little threat to this rugged lamp; the housing is IP54-rated to withstand splashing water or rain.