Dwn is a rear light with USB charging. The light attaches with a rubber band, so it is able to attach to handlebars of different diameters. The Dwn is a small but very powerful tail light with a matte design. It can be recharged using the supplied USB C cable. As the light is rechargeable, it is a sustainable alternative to conventional battery lights. The battery offers up to 7 hours of cycling pleasure. The light has an integrated brake light function. The brake light function makes cycling in traffic safer. This way you can see that the bike in front of you is slowing down, and the person behind you can see that you are slowing down. When the battery is almost empty, the battery indicator will light up. When the battery is 21-50% charged, the light will turn green. When it drops below 20%, it turns red. When you charge the battery, it will be fully charged in less than 1.5 hours! LIGHT: 300 meters' be seen Safety description Brake light function 1 LED LED Conforms to German regulations (StVZO) Visibility 300 meters Comfort description Easy to operate switch Fastening strap diameter 10-32 mm Low battery warning indicator Technical description USB rechargeable battery Battery life: 7 hours Battery charging time: 1.5 hours Rechargeable with supplied USB C cable