The S2000 flashlights utilizes upgraded OSRAM P8 LED, which is 3 times brighter than ordinary T6 LED flashlights, can delivers an incredible brightness of up to 2000 real lumens. This mid-size flashlight is big on power but still compact enough to fit in your hands, backpack, survival bag, or car glove compartment. Using 4*AA batteries (not include) as power supply, our high lumens flashlight has impressive run times, providing up to 30 hours (low light mode) of continuous operation, or 6 hours (high light mode). No more cycling through endless modes! Only featuring 3 useful light modes (High - Low - Strobe), it effectively reduces the trouble of switching 5 modes. Just twist flashlight head to adjust the focus for distant observation and wide range illumination. It's ideal for camping, hiking, outdoor, repairs, and other emergencies.