Garmin 010-02376-00 Varia RTL515, Cycling Rearview Radar with Tail Light, Visual and Audible Alerts for Vehicles Up to 153 Yards Away

This is a must have for any cyclist who is extra nervous about cars approaching from behind. The device sends a signal to your Garmin bike GPS warning of approaching cars, etc from behind about 5 seconds before you hear them. It makes cycling much more relaxing.

Battery has good life and radar works very well.

Will not vibrate

Ive used a rear view mirror for years, so I wondered if I really wanted/needed one of these. The answer is yes. This thing spotted cars that really didnt show up well in the mirror, and it was nice seeing how many cars were coming.

It tells me, before I even see a car that one is approaching, especially on streets with blink corners. Adds a whole other level of safety. Really worth it, to have such advanced notice of vehicles coming.

Delivered within 4 days. Very impressive and better than expected.

Awful. Wish I could get my money back. If I could rate lower I would. Completely a rip off. Fell for it .....again

Ok this is a home run product. I have used it on several rides. The interaction with my Garmin 830 gives me a heads up and helps me to make better decisions about intersection turns etc. NO false positives, or false no detections on over 100 miles of usage. I have not used in the city . Only rural riding so far.

Excellent!

I got this for my boyfriend, and so far everything is good and he loves it! Safety first :)