Review on 🚴 DINOKA Waterproof Wireless Bicycle Bike Computer with Speedometer, Odometer, and LCD Backlight Display – Multi-Function Cycling Companion by Brent Porter

I lost a day of my life trying to get this to work. Like other reviewers, it failed to register speed. I followed the installation instructions exactly. Tested battery voltage. 3.3V, batteries removed and changed several times. Reset and reprogrammed many times. Make sure the air gap is within 3mm, make sure the units are within 60cm and test at much smaller distances. I believe that the radio transmitters in these devices are too weak or defective. I was drawn to this product because it was cheap and had good reviews. Just wanted a basic bike computer for a second bike. I've used Cateye computers on my other bikes for years with no problems.