Our digital ballasts are manufactured using high quality electronic components, each are comprehensively tested to ensure they will last. Includes a single ballast with mounting brackets and hardware. Features: 9v-15v in and 35w out Plug-and-play installation - Directly replaces any HID ballast 100% Weatherproof and Waterproof Circuitry regulates and stabilizes constant power supply Reverse polarity protection Vibration/shock resistant