The Magnadyne VP400 Vintage Power Inverter is a reliable and efficient unit designed to convert 12V negative ground voltage to positive ground voltage. With a brand name known for quality and durability, this power inverter is ideal for various car electronics and accessories that require a stable power source. Whether you need to power up your GPS system, portable lights, or other vehicle electronics, the Magnadyne VP400 Vintage Power Inverter is a convenient and reliable solution for your needs.