Item: B41-2129 
35 Lumen 40 Hour Max. Runtime 30Ft. Drop Tested
One of the toughest, most durable headlights Rayovac has made to date, this bright, long-lasting, durable LED headlight will work just as hard as you do. This flashlight features a super bright 35 lumen, high performance LED that produces an amazing 35 lumens of bright light while still running a 40 hour runtime on high and 19-hours on low. Operates on (3) AAA batteries
Designed for maximum durability and simplicity, it offers a 60-degree pivoting head and it comes with a comfortable headstrap made of cloth and silicone. The durable internal and external engineering allow for virtual indestructibility, and it's been drop tested to a height of 30 feet. Constructed of aluminum and titanium alloy, it will withstand any environment, and it has an IPX4 water resistance rating. It also includes rubber head and tail cap shock absorbers that can stand up to the challenges life can bring. This headlight is backed by a lifetime guarantee.
The Power of LEDs
A perfect light source for modern headlamps, LEDS are virtually unbreakable, and they contain no filament or mercury. Lasting a lifetime, they never need to be replaced. And they use battery power much more efficiently, greatly reducing the number of batteries needed over the life of the light.
The DIYHL3AAA-B has two modes of operation--a bright high-performance setting and a lower-lumen energy saver mode for longer battery life.