The performance of modern LED technology is very impressive – with just one of the 1 watt Luxeon LED, an output of 35 lumens is reached, and the 3 watt Luxeon reaches a maximum output of 65 lumens using minimal energy (battery power). The body is made of hard coat anodized airplane aluminum. The tail cap switch can be used for both constant light and momentary light, and the o-ring seal keeps moisture and dirt out. The black coated stainless steel clip keeps it close at hand. Available in three versions: Compact and powerful. With an overall length of only 3½“ and a diameter of ¾“, this aluminum model fits perfectly into every pocket. The 1 watt LED has a maximum output of 35 lumens. Weight: 1.8 oz. Includes two 3 V Lithium batteries (CR 123A).