Certification:ce Origin:Mainland China parameters: Material: aluminum alloy Low voltage warning: yes Reverse polarity protection: yes Lens Type: ar-coated lens Reflector: Orange peel Switch position: side Mode memory: yes Tail stand: yes Driver output : 12V 2.5A GT FC40,  6V 5A XHP70.3 HI Maximum charging current: 2A CRI: R9050 Flux: 2500LM Battery charger includes: not included Battery type required: 1*21700 battery Number of batteries required: 1 Size: Head/body/tail diameter: 40mm/27.5mm/29.5mm length: 143.8mm Product weight: 145g Mode operation instructions: 1.click the button  ——>  flashlight is turned on with last brightness ——> press the button,brightness ramping up ——> release and press the button again,brightness ramping down 2.flashlight off, press the button  ——>  moonlight mode  (0.2%) [ This brightness will not be remembered ] 3.flashlight on or off, 2-click the button  ——>  turbo 100% 4.flashlight off,3-click the button ——>  strobe 5.flashlight off,4-click the button ——>  tactical mode, only 100% ,4-click the button again to quit tactical mode. 6.flashlight off,5-click the button ——>  voltage detection  (* means "flash" ,  *** pause ******* means 3.7V, ) 7.flashlight off,6-click the button ——>  normal ramping mode switch to 4modes 1%-10%-40%-100% 8.flashlight off,10-click the button ——>  Lock mode,The flashlight will flash once under any operation, which means the flashlight is locked.10-click the button again to quit lock mode,Please note that this is the only way to unlock. The flashlight has low voltage protection and temperature control protection.