electronic ballast 1.HID easy startup xenon kit 2.low defective ... years lifetime kit 4.bulb: H1,H3,H7,900 factory electronic ballast, D2C H1 H3 H4 H7 12V/35W 1.easy ... stable brightness quickly within 5 seconds upon cold boot, more safe for driving. 4)With excellent digital microchip made in USA ... -90dB; Absolute value: less than 5mW for our product. factory electronic ballast, D2C H1 H3 H4 H7 12V/35W