Review on 🚴 iGPSPORT Bike Speed Sensor - Compatible with iPhone, Android Bike Computers, Smartwatches | ANT+ and Bluetooth Support by Jeff Dabney

First install this teddy bear. Be very careful with the instructions because if you install the battery incorrectly you will have to remove it. I was only working with my wife so we had 4 hands and with 2 screwdrivers to stretch the strap properly we were able to fasten it. After that it was really terrible. It sensed my speed for about 30 seconds and then turned off completely. My phone (with bluetooth) was about 1 inch from the bike (bike) tire the whole time. I guess it's time to try another speed sensor - it definitely wasn't the right decision.