The UTL-15 Cosmo 15 Tail Light by Serfas features a triple-LED setup that keeps you seen in the dark. There’s high and low constant modes, and two flash modes to conserve battery life. An adjustable, tool-free mount connects it to your seatpost, and the angle is adjustable to accommodate to you seattube angle. It’s easy to use, and features a quick release tab for fast removal and charging.
Multi-mode use for ranging battery life and brightness
Tool-free installation fits easily on a range of seatposts
3 LED’s at 5 lumens each, combine to give you 15 lumens of bright light
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