HID Ballast 1.Defective rate<1% 2. Different bulbs type compatible 3.15 months warranty 4.CE /FCC /ISO9001 approved Hella Type AC Digital HID Ballast ... energy consumption Compatible with: H series: H1,H3, H3C,H4-1,H4-2,H7,H7C,H7R,H8,H9,H10,H11,H13 ... items are up-to-date from time to time Hella Type AC Digital HID Ballast for Auto Xenon Lighting