SUNWAYMAN's one-of-a-kind V-Series combines cutting edge technologies for an optimal lighting experience. These lights utilize SUNWAYMAN's signature Magnetic Control System in conjunction with a Fully Variable Output. What does all this mean? It means these SUNWAYMAN LED flashlights can adjust seamlessly through any desired lumen output from minimum to maximum with one smooth twist of the magnetic ring. If you have never experienced the fine craftsmanship of a SUNWAYMAN V-Series flashlight, you will surely be amazed.