Weighing in at less than three ounces the Aurora headlamp is compact ultra-lightweight and waterproof. Princeton Tec has incorporated numerous contemporary design innovations such as the adjusting pivoting head that shines light just where you need it and the durable ultra-light strap that provides plenty of adjustment for the perfect fit. The unique triangular configuration of the three high output L.E.D. lamps provides an extremely even beam of light that keeps shadows to a minimum. The electronically controlled switch system of the Aurora provides easy switching between five different output modes. With three levels of constant light output offering burn times from 50-150+ hours and two blinking modes. The Aurora is sure to satisfy every outdoor situation: camp set-up trekking climbing emergency and signaling situations. 10 000+ hours L.E.D. bulb life 150+ hours of burn time Less than three ounces Requires three AAA batteries (included)