Specifications:CCT Range: 5350K-5700K, neutral white (NW)Voltage: 2.8-4.2 VPower: C8 A--(18 W,Max current 5.6 A) , C8T--(14 W,Max current 4.5 A), Please be sure your battery supports high currentDimensions: (head x body x length) 44.6 x 24.5 x 144 mmNet Weight: 140 gram (without battery)Material: 6063 aircraft-grade aluminum alloy,Premium type Ⅲ hard-anodizedLight Cup: smooth reflectorThe water-resistant level is IPX-8, it can be used underwater up to 2 meters for 30 minutes. Usable in rainstormsMode Memory: YesLow voltage protection: Yes. The light automatically turns off when the voltage is lower than 2.8 volts. The signal is that the light slowly flashes for 1 minutesReverse polarity protection, to protect from improper battery installation. The light remains off if battery is installed improperly.Battery: Powered by one 3.7 V 18650 battery ( not included, but suggested)Features and specifications:Sofirn New C8 with 2 groups and easy to change groupC8A: Adopt 1 XP-L2 LED with max 1747 lumensC8T: Adopt 1 XP-L HI LED with max 1310 lumensC8F:Adopt 3 XP-L LED with max 2580 lumensON / OFF: Full press the tail switch to activate or deactivate.Group set operation: When on, 3 clicks continuously, the light flash 2 times and then automatically goes to next mode group.Mode set operation: when on, half press to change or cycle modes: Moonlight / low / medium / high / SOS (group 2) or low / medium / high (group 1).Hidden strobe: When on, 2 half clicks to activate Strobe, and 1 half cl