Review on 🚲 SKARLIE Bike Speedometer with Heart Rate Monitor, Cadence Speed Sensor, and Backlight - Multifunctional Bike Computer Odometer with Altimeter for Enhanced Cycling Experience by Eric Temple

Installation instructions were a little less than I was hoping for. I did my best and was able to place the speed sensor on the front fork of my road bike, which required a magnet on the spoke on the front wheel. You want the distance between the magnet and the sensor to be within 2mm. The only way to adjust is to position the sensor (attached to the fork with zip ties) closer to the magnet, but not so close that the magnet hits the sensor. Once you think you've set it and start riding, it only takes a few bumps for the sensor to shift and you're no longer getting speed readings. At first I thought the computer itself was failing, but the rest of the sensors continued to function properly. I also attached a cadence sensor, a magnet to the crank - it has weak adhesive on the back, and you use a zip tie. The corresponding sensor is attached to the chainstay. This seemed to hold position better than the speed sensor. The heart rate monitor is quite comfortable to wear - after the first ride I forgot I was still wearing it. It seems to give accurate readings. The computer itself can support two bikes. You can set the wheel circumference for each bike and keep a separate odometer for each. In addition, you can specify the "mileage" when the computer reminds you to service the bike (the default value was 600 miles).