A Digital HID Ballast Replacement High Quality Metal Case 35W AC Capability of working with the most US cars 100% waterproof and 100% dustproof. Resistance to heat and aging, as well as vibration tested. Smaller dimensions: Integrated designed, igniter is integrated into ballast. Heavy Duty Fully Steel Ballasts The input ranges from 9V~16V, which means can they be installed on both cars and bikes without any further modification.