... 1.Real factory, high quality 2.HID No.1 in alibaba website and inChina market Specificationshid ballast,hid lamp ballast passed ISO ... ) With magnetic control unit inside, making bulb tube move in and out to creat high and low beam2) UV cut glass for headlight protection3) Waterproof and ... performance5) Working temperature: -40º C-+105º C6) The ballast matches all lamps, such as H1, H3, H4, H4 H/L, H7 ...