Description: Ballast with aluminum case: anti-shock and low-voltage protection. Plug & play: easy to install and no modification required. High-voltage and low-voltage protection function. Very good anti-interference function of electromagnetic radiation. Specification: Material: Plastic Size: 8x5x3cm/3.1x2x1.2 Inch Input voltage range: 9-16V Standard input voltage: 12V Starting current: 4.5A Normal operating current: 3.2A Output constant power: 55W This ballast is universal fit for all aftermarket HID light bulbs as below. -H1, H3, H4, H7, H8, H9, H10, H11, H13 -HB1, HB2, HB3, HB4, HB5 -9003, 9004, 9005, 9006, 9007, 9008, 9140, 9145, 880, 881 (all 800 series available) Package Includes: 2 Pieces HID Ballast