A great headlamp at a great price. The EOS is a light weight multi-functioning headlamp that features: one (1) Maxbright Luxeon LED with three levels of brightness and the ability to go to signaling/blinking mode at the press of a button, a 3 AAA battery footprint that eliminates the need for a battery pack on the back of your head, and the true current regulation provides a constant brightness for which ever level you have chosen to use. This eliminates that quivering light defeating the purpose of having a headlamp! This little headlamp is durable and can withstand the tolls of being on the fire line. Burn time is approximately 6.5 to 60 hours (depending on which level), and requires 3 AAA batteries (included). Adjustable head rotates down and up. 130 lumens.