Ultimate Survival Technologies Enspire Headlamp Comfortable, adjustable headlamp with four modes of lighting and up to 160 hours of runtime on Low; ideal for backpacking, jogging, travel, and more Unbreakable Nichia white LED bulb; focus control adjustment allows for broad or directional beam Impact resistant rubberized housing; IPX4 water resistance (protects against splashing water from all directions) Rear battery pack with independently operated red Steady On and Flashing modes Runs on three AA batteries (included); weighs 7.8 ounces (221 grams) with batteries