SINGLE BUTTON SWITCH - super simple interface allows for one handed operation to activate and cycle through all of the settings. USB-C RECHARGEABLE - The NU05 v2 comes with a rechargeable built-in battery that gives up to 47 hours of runtime on a full charge. DUAL SIGNAL LIGHT- The NU05 v2 has 4 LEDs in a compact X pattern: two white and two red and can double as a simple flashlight, or signal light. VERSATILE SIGNAL LIGHT - the NU05 v2 can be attached to belt loops, backpack straps, hats, pockets, molle systems, and more with its rear clip. VERSATILE SIGNAL LIGHT - the included headband strap and bike mount, allows for a variety of attachment options, in addition to the rear clip on the NU05 v2.