1. The product is designed to point the cigarette type, use, directly into the car cigarette lighter seat, very convenient; 2.12-24V input voltage, can be used in cars, trucks, RVs, boats, buses and other vehicles; 3.2.1A output current, to the mobile phone, tablet, navigation, GPS and other power supply; 4. voltmeter to measure the voltage of 8-36V, voltage conditions at any time concerned about the car, we can deal with unexpected situations in a timely manner, to ensure traffic safety; 5. This product uses for efficient charging circuit IC design, sophisticated materials, long charging no heat, long life, to ensure safe use.