A fantastic safety development for cyclists. If you ride on busy streets, this may save your life. Radar will notify you of overtaking vehicles before you can hear them. Works perfectly with my Garmin Edge Explorer (and other similar bike computers) and there is also a smart phone app (which I did not evaluate). There is another version with a built in tail light (RTL515). Get this one if you already have a rack mount or other tail light. The radar functions the same for both. Well worth the cost and highly recommended!
Pros: Easy install and setup.
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