Water-resistant headlamp has a bright-white LED that produces a 100-lumen beam that extends visible light out to 95 ft. The boost mode pushes output up to 130 lumens for 15 seconds. Use the focusing mode to adjust beam from tight to wide. Five lighting modes include: white (high, medium, low); red for nightvision; and strobe. Green blinking "find me" or "follow me" LED. Comfortable 1" nylon strap. Powered by three AA batteries (included) for up to 10 hours.