Dual glass/polycarbonate lens: shatterproof & high-heat resistance. Made of virtually unbreakable Black Delrin with non-slip rubber body. Advanced aluminum heat dissipation system. 2 position end (constant-on, intermittent). Focusable beam and shock-resistant lamp assembly. Waterproof to 100M. Belt pouch included. True xenon Japanese made bulb. Bezel diameter: 1.12". 120 Lumens, Length: 4.9". Weight without batteries: 3.25 oz. Two CR 123 3V batteries.