Source: U.S. imports CREE XML - T6, the LED 1000 lumen Material : aluminum alloy , three anodizing , tail button switch The range of : more than 800 meters ( all aluminum smooth optical glass ) Stall mode : flash of light - light - low light - burst -SOS Shell color : black Battery: 2 18650 lithium-ion battery Specifications : 235mmX50mmX30mm