10w Zoom LED Headlamp. Zoomable beam. Aluminium alloy construction. High power 10w CREE XML2-U3 LED. 4 x AA batteries included. Three light modes: High, Low and strobe. 850 Lumens – range 150 meters. IP66 waterproof design. Anti-shattering ultra clear lens. Anti-shattering and anti slip. Working voltage: 3.7v – 4.2v. 4-10 hour endurance.