The Serfas USL-BI USB Light has four settings that allow you to choose from solid white, flashing white, solid red or flashing red. Its multiple color/flash modes, USB charging, and silicone design that can be mounted to numerous places on the bike, make it an extremely versatile commuter light.
Both White and Red LEDs for Either Head or Tail Modes
Charge Indicator Light
Modes: High-Beam, Low-Beam and Flash in Both Red and White
Run Time: Up to 10 Hours in Low Flash
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