Usage: Plug the device into the car's OBD2 socket All LEDs will blink and then stay on Turn the ignition key on to enable the circuit board electronically but do not turn on the motor Press the button for the operation you want to perform Soon the LEDs for the selected operation will be lit and the other LEDs will be off The LEDs will carry a light chain, which means the reset is complete On some dashboards, a check needs to be carried out on the reset before oil Reset Note: Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks!