... slim hid ballast (0.6% defective rate)1.Quick Start xenon ballastsHigh quality and competitive priceLow defective rate5 protective functionsCE,Emark ... keep color temperature coherence.4,High luminance, match hid xenon auto light H1,H3,H4,H7,H8,H9,H11,H13,,H4/H ... voltage protection test. 4) Over voltage protection test. 5) Flash light concussion test. 6) Quakeproof capability test. 7) Cold & warm boot ...