In order to prevent the bulbs from running out of the car’s battery, the car could not start normally. When the car’s battery voltage is lower than 7.5V, the ballast will automatically shut down and stop working. In order to prevent the burning of other vehicle equipment when the voltage is too high and to allow the owner to immediately discover the fault of the vehicle, when the car’s power supply system and battery fail and the voltage is higher than 16V, the ballast will automatically shut down and stop working. When an accident or short-circuit or open circuit occurs, the ballast will immediately cut off the circuit to prevent electric or of tank and ensure the safety of life and property. When the “+” and “-” polarities of the power supply are reversed, the ballast will not be damaged and the safety of the ballast will be ensured. Features - Color: Black. - Material: . - Size: 8.5 x 6 x 1.5cm/ 3.35 x 2.36 x 0.59 inch. - Power: 35W. - Operating temperature: 40°C - 105°C. - Input voltage range : 12V. - Long life: At 30000 hrs. - Saving electricity, power is only 35W. - Life up to 3000 hours. - With low-voltage protection, high voltage protection, short circuit Protection and reverse protection. - The unique high pressure , shielding effect is very - Waterproof, weatherproof and shockproof. - Output disconnection protection function. - Has good waterproof, , anti-vibration functions. - Has a good anti- radiation function. - output design, wider adaptability to the bulb, and increase lamp life than 50%. Package list: 1 x ballast