One pair /2 PCS 35W Waterproof Dustproof Anti-vibration HID Xenon BALLAST For H1 H3 H4 H7H10 H11 9005 9006 D2R D2S All Sizes - Not suitable for the Germany car, for example: BMW, AUDI,Volkswagen, Mercedes-Benz and so on Protection against over pressure; LOW volts protection,protect your battery; No load protection,protect yourself; Protection of opposite connection