Product Name: Car Voltage RegulatorModel Number: ST-001,002,003Place of Origin: ChinaThe voltage regulator manages the alternator\'\'s output according to vehicle operating conditions. The voltage regulator must balance the needs of a fully charged battery, long battery life, accessory loads, and long light bulb life. For these reasons, voltage regulators must operate at specified voltages. Inner packing: Color box Outer packing: Carton