Acebeam X45 is an absolutely amazing flashlight. It powered by 4x18650 High Discharge IMR batteries(Included) and utilized 4xCree XHP70 P2 LEDs, super high output reaches 16500 lumens and ultra-long distance goes 583 meters. The side switch is controlled all functions through easy one-handed operation. X45 is the brightest light in Acebeam's brightest line, widely used in many fields such as search and rescue, camping, hunting and self-driving. X45 will become your invincible companion and bring you unparalleled outdoor illumination experience. Working Voltage:12V-16.8V light on switch indicates low reserve Max Runtime 310hours Max beam 583 meters Impact resistant 1.2meters Digitally regulated output- maintains constant brightness Made of durable aircraft grade aluminum ultra-clear tempered glass with AR coating, 98.3% transmittance, protected by a stainless steel crenelated bezel 4xCree XHP70 P2 LED with a lifespan of 50,000hours