Product Specifications High Lumens: 550 Run Time on High: 2.25 hours Run Time on Low: 16.00 hours Beam Distance: 203 meters Max Candela: 10,250 Battery Type: Lithium Polymer Cell, AA Alkaline Battery Quantity: 1 - 2 Length: 6.00 inches (15.24 centimeters) Weight: 3.50 ounces (99.22 grams) Colors: Black, Coyote The ProTac 2AA-X USB is a slim, tactical flashlight that uses a USB-C rechargeable battery pack and can also accept two AA alkaline batteries as a backup. About the size of a marker, it conveniently fits in your pocket and produces 550 lumens.