The lightweight, waterproof Airstream rear light, weighing only 36 g and featuring Twin Beam technology, draws its power from the large main battery of the Airstream, eliminating the need for a separate power source. This makes it the smallest battery-operated rear light in the world. Additionally, it is the brightest approved rear light on the market. The rear light is easily connected to the charging port of the Airstream, and the smart electronics of all Airstreams automatically recognize it. The operation of the three highly visible LEDs only reduces the Airstream's battery life by a few minutes. The universal seat post mount fits all diameters and is easy to install, securely holding the compact rear light even under heavy vibrations. With the reliable Airstream rear light, you can confidently forget about failing plastic rear lights.