It is a lap timer circuit dedicated magnet is embedded.

It will receive the data via USB from a dedicated hardware of the magnetic sensor built-in.
Therefore, it can be operated with only a USB host function compatible models.
Please contact me by e-mail the person that do not know well.

Because I use a high-precision clock inside, it's using the clock of the Android device itself
It is time to more accurate measurement. It might be the margin of error is 1 lap around mini circuit ....

※ There is the case that there is a difference with the (result) time provided by the circuit.

1ms minimum measurements are (1 millisecond).

Please contact us by e-mail the person who want a dedicated hardware.
Screen'll Dasai! One called, please sense.