HDD-1065 CREE Q5ultra bright High power LED Flashlight Material: AerospacealuminumT6061Emitter: CREE Q3, Brightness: 150-180lumens, the service life 100,000 hours Drive plate: constant current drive, Three dimming with memory.Reflective cup: aluminum alloy mirror reflector cupLens: tempered glassBattery: 1*18650 rechargeable lithium batteriesOperating voltage: 2.8V-4.2VOperating temperature: -25 65Switches: the tail button switch Dimensions: Dia 49.5x191MM(L) Weight:300g (without battery) Brightness, working time and lighting model: working informationunder 2200mAh 1*18650 lithium battery powered 1st: 100% brightness,workingtime is 3.5 hours2nd: 50% brightness, working time is 9 hours 3rd: the general frequency of 9 Hz when flashing