MatMaterial: Aluminum alloyLED: luminus sst40 6500K white and 5000K neutral white/SFT40 6500K white light/LH351D high color renderingLow voltage warning: YesReverse polarity protection: YesLens type: Ar plated glass lensReflective cup: smoothGear memory: YesTail inverted: YesIncluding battery: NoRequired battery type: 18650 lithium battery (battery should be able to withstand 5A or above)Number of batteries required: 1pcsDrive: Four gears 0.1% -3% -30% -100% or 12 groups, maximum current output 5000mA, internal temperature protection managementHeight: 118mmWidth: 24.1mmWeight: 76gFourth gear 0.1% -3% -30% -100%12 mode instruction video:https://cloud.video.taobao.com//play/u/275339344/p/1/e/6/t/1/303077252770.mp412 -mode of debugging text instructions:1. Click on the switch to turn the flashlight on/off, and half press the switch to select the modeIf the flashlight is turned on, quickly press the switch half way 20 times to enter configuration mode. On a visual interface (such as a mobile phone), simply clicking on an option indicates that it is selected. A flashlight does not have a visual interface, it uses flashing to indicate an option, and "half pressing the switch during flashing" means selecting the optionOption 1 (normal flashing once+buzzing flashing): Press the switch halfway to enter the sub option and start selecting the gear group. If the user has no action, the configuration mode will enter option 2.-------------Sub option 1.1 (regular flashing once): Tap the switch to select gear group 1 (0.1%, 1%, 10%, 35%, 100%, flashing, beacon, battery detection)-------------Sub option 1.2 (regular flashing 2 times): Tap the switch to select gear group 2 (0.1%, 1%, 10%, 35%, 100%)-------------Sub option 1.3 (regular flashing 3 times): Tap the switch to select gear group 3 (100%, 35%, 10%, 1%, 0.1%)-------------Sub option 1.4 (regular flashing 4 times): Tap the switch to select gear group 4 (1%, 20%, 100%, strobe, burst, beacon, battery detection, SOS)-------------Sub option 1.5 (regular flashing 5 times): Tap the switch to select gear group 5 (1%, 20%, 100%)-------------Suboption 1.6 (flashing light 6 times): Tap the switch to select gear group 6 (100%, 20%, 1%)-------------Sub option 1.7 (regular flashing 7 times): Tap the switch to select gear group 7 (0.1%, 1%, 10%, 50%, flash, beacon, battery detection, SOS)-------------Sub option 1.8 (regular flashing 8 times): Tap the switch to select gear group 8 (0.1%, 1%, 10%, 50%)-------------Sub option 1.9 (regular flashing 9 times): Tap the switch to select gear group 9 (50%, 10%, 1%, 0.1%)-------------Sub option 1.10 (regular flashing 10 times): Tap the switch to select gear group 10 (1%, 10%, 35%, 100%)-------------Suboption 1.11 (regular flashing 11 times): Tap the switch to select gear group 11 (100%, 20%, burst)-------------Suboption 1.12 (regular flashing 12 times): Tap the switch to select gear group 12 (100% single gear)Option 2 (regular flashing twice+buzzing flashing): Press the switch halfway to activate or deactivate gear memory. If the user does not perform any action, the flashlight will enter the last gear.Battery detection instructions: 3.85V 5 flashes