<p>Thie NITECORE SRT7i Superior Performance SmartRing Tactical flashlight, with the 4th generation Smart Selector Ring, features stepless brightness adjustment from 0 to 3000 lumens and a max throw of 580 meters. Equipped with 2-stage tail buttons and a tactical U-shaped tail cap, it is USB-C rechargeable, powered by a 5000mAh NL2150HPi rechargeable Li-ion battery.</p>