Z Drive Flashlight offers exciting new features not found in other lights. Multi cavity use technology allows the light to run on 1, 2, or 3 AAA batteries. Even if you only have one working battery, you can still have light! This technology also allows for the light to take on the characteristics of three different lights in terms of lumens and run times. The Z Drive features 300 lumens on high and 120 on low, with run times of 2 hours on high and 8 hours on low thanks to Dorcy’s patented PWM circuitry. A slide focus lens allows for precision focusing of the beam and a built in LED battery power indicator “fuel gauge” keeps you informed of how much power is left. Constructed of machined aircraft aluminum with knurled non-slip barrel grip, this light is durable and has a great feel.