Good for its price. You will struggle with wheels under 16 inches. There are worse options available

Useless. It never worked. It's better for someone to go out on the street and give the money that was spent to someone in need. At least that would make a difference.

Very good for the first year. After that, the battery died and I replaced it. After doing that, it lost connection with the sensor (I also changed the battery in the sensor to be sure).

It is very good for its price. It just needs a small distance between the magnet and the sensor radius to have accurate readings.

I bought 2. One works, the other doesn't. It's worth giving something extra to have proper results

First impression from the purchase. A cheap speedometer that is only suitable for bicycles and small motorcycles. It is not suitable for larger motorcycles because it has a maximum indication of 99.99 km/h. The quality of the plastic is acceptable (not the best). I will come back regarding its functionality.