Review on Stay Ahead of the Game with the Waterproof Wireless Bicycle Speedometer - LCD Display & Multi-Functions by Timothy Wall

Great gift. Works great with e-bike. Only tested to 20mph but very accurate. Installing the sensor was the only part that took me a few tries. The manual and photos show the sensor pointing directly at the spokes, but there wasn't enough clearance on this bike. So I had to move the sensor 45° towards the rear of the bike and position the magnet at an angle to the sensor. (Attached image). After installation everything worked as expected.