See and be seen with Serfas' USL-R USB Taillight. It has steady and flashing modes, runs for up to 6.5 hours, has a quarter-mile visibility and is easy to install and remove thanks to the built-in universal quick-release rubber strap. Recharging the light's battery is simple and convenient, too. When the battery indicator tells you it's time, just plug the light into your computer's USB port.
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