The anti-arc protection preserves the electronics of a vehicle by absorbing the overvoltage peak during welding operations or vehicle interventions. SIMPLE TO USE -To be connected simply to the + and – of the battery OPERATION -Green LED on: Normal use, the protection is activated. -Red LED on + buzzer sounds: The unit has absorbed an important overvoltage and the vehicle is no longer protected. It is necessary to replace the anti-arc protection to protect again the electronics of the vehicule.