The X2 is our newest most powerful flashlight. It's equipped with 7x CREE XM-L2 U2 LEDS giving it a total output of 4200 Lumens. Runs on Three or Two 26650 Li-Ion Batteries (included) and charger. Runs for 4 hours on high. Great for ranchers, hunters, boaters or anyone who needs a wide and powerful spread of light.