Mine came from Hobby Parts. Shipped with a FS-SPD01 Magnetic.
No magnet include with sensor.

The Instruction Manual shows how to install on page 12.
-magnet can be placed on inside of wheel rim
-sensor can be placed on other side of wheel (beyond tire)

THe manual shows it does not require a very close proximity of sensor
to magnet. Hope that's true.

Have not tried it yet. I've wondered if it can work with the magnet
in a CY magneto (rotor)?