OUTPUT---12V 8W max, depends on your USB port power supply, easy to operate and convenient to use. HIGH PERFORMANCE---USB port power converter, Power conversion from USB port to 12V cigarette lighter socket. synchronous rectification, the conversion rate is 95% or more, reduce heat and operating time EASY TO USE --- Easy to start your car power electronic equipments (such as a bank power supply). WORK EFFICIENTLY --- Easy to activate the parking monitoring function of your car driving recorder, no need to worry about taking out your car battery any more WIDE APPLICATION---Fit for electronic dog, driving recorder, automobile car charger and other electronic equipment.