Module that allows you to adjust the reading of the engine revolutions, as on some cars after the installation of a tachometer it is easy to read the engine revolutions only by half. With our simple board with microprocessor it is possible to solve this problem
To solve this problem just connect this module, simply connecting 4 wires.
Useful when you have engines with lost spark, or 2 cylinder engines that need to be connected to tachometer for 4 cylinders.