The genuine GRANIT 4990717 surge protection device is designed for 12V and 24V on-board electrical systems. It effectively protects sensitive electronic components from damaging voltage peaks that can occur during welding operations or engine starting. This robust unit features both acoustic and optical warning signals to alert users of overvoltage conditions, ensuring proactive protection. Its IP65 protection class guarantees durability against dust and water ingress. Installation is straightforward via battery terminals, making it a versatile and essential accessory for agricultural, construction, and industrial machinery.