This is a very powerful light source, producing 550 lumens. The Stone headlamp has 5 light modes and remembers the last setting, so you don't have to press the button unnecessarily. Thanks to the elastic rubber strap, the headlamp is easy to mount on the handlebar tube. At the top of the Lynx USB headlamp are 3 green LEDs, which serve as a battery indicator, so you never run out of light. The Stone 550 headlamp is fully charged within 4.5 hours with the included USB-C charging cable. It has Danish approval regarding bicycle lighting regulations. Packaged in a display box.