Bought the UT800 along with a Garmin 530. Paring the two was very easy. As a bike commuter, I love the entire Garmin smart light system (I also bought a second hand Varia Review Radar/Light). The UT800 is bright enough for my needs, especially at night when I commute home from work. Battery life is surprisingly good as long as you are not using it at full power for an extended period of time.
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