EMERGENCY POWER SUPPLYBuilt-in 2000MAH large capacity rechargeable lithium battery,Latest rechargeable design,Up to 4 hours operation once fully charged and can also serve as a power supply to charge your phone for emergency.Simply connect your smart phone to the USB output port at the base of the flashlight. You'll be fully charged in a flash,make your Outdoor Activities safe and happy WATERPROOF & TOUGHIP65-rated water resistant and designed for use in heavy rain,its military-grade aluminum-alloy body and 3m impact resistance and endure rough handling. THE PORTABLEThe anti-slip,comfort-grip handle keeps the torch in your hands at all times,makes it the top pocket flashlight for outdoor activity,camping,hiking,fishing,home use FOCUS ADJUSTABLE:3 MODESThree Useful Settings,high brightness;low brightness;strobe(intermitent flashing)Adjustable focus for close or long range,Functions as a spotlight that throws an bright beam of light up to 600 feet ahead or compact small floodlight