Light source: 3X CREE XM-L T6 LEDLEDLife: 100，000 hoursBrightness: 3800 lumensWorking voltage: 3.7-4.5V，Five-speed output: light - light - low light - flash explosion -SOS distress signal Internal circuit-efficiency constant current output lines，maximize the use of batteries Waterproof design Aluminum alloy reflector housingBattery: 2 18650 batteries (not included) or three 18650 batteries (not included)Life time: 1 hourColour: Black Accessories:1X Trustfire TR-3T61X flashlight torch extension tube