I have been using these sensors for 2 years and they work well. Still runs on original batteries. I connect these sensors to my Polar V650. We have other bikes with the Wahoo Blue SC sensor and the Wahoo is having connectivity issues and constantly needing to replace the batteries. Polar is also more flexible when it comes to installation with two sensors. Finally, the Polar sensors stay in place much better than the Wahoo Blue SC, which can slip easily.
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