Key Specifications/Special Features: Input voltage range: 6 to 22V True plug-and-play function for different sizes Water-resistant system Reverse polarity and internal voltage protections Open-circuit and short-circuit protections Vibration-resistant Operating temperature: -40 to 120 degrees Celsius Various ballast and bulbs are available Includes: Two x I type ballasts Two bulbs Instruction book Repair-card Two steel planks Two setscrews Two dual-adhesive tape Group of harness cables and Anti-jamming wire circles Advantages: Housing material: aluminum Lighter and flintier More beautiful and more popular Aluminum Box