Optimized for the urban commuter seeking a no-hassle light, the Portland Design Works Asteroid USB Headlight provides super-bright optics considering its incredibly compact design. The Asteroid USB Headlight uses a faceted lens to project its 25-lumen output across a wider swath than a traditional headlight, so you're visible to oncoming traffic and can navigate across the city after dark. It's weatherproof from oncoming showers and road spray, so you won't have to worry about it getting ruined in wet weather. Flash, pulse, and steady modes allow for basic customization to your lighting needs and last anywhere from 4 to 24 hours of continuous use. And when it does run out of battery, simply plug the light into any USB port to charge it in a couple of hours. Portland design works includes a micro USB charging cable and rubberized handlebar mount with this headlight.