Features: Condition: Brand New and High Quality Strict factory QC testing, high quality assurance. Long service life, not easy to damage. Distribution management, intelligent distribution, more current, save charging time more than 30%; safe, fast. The output voltage is 2.1A and 2.1A. Strong performance, the output voltage and current accuracy of high precision, response speed, intelligent identification, use more stable security. Apply to all mobile phone brands, tablet PC, GPS and other electronic equipment, to eliminate the critical moment of power embarrassment. Use for small cars, off road vehicles, mini vans (no more than 24V), yachts, motorcycles, ships. (Most trucks, excavators, large trucks, battery voltage is actually more than 48V, which is not recommended to use this type of car!!) ATTENTION: Please make sure that the voltage of your car is at 12-24V!! Cannot be positive and negative intermodulation, so as not to burn the electronic products!! Package: 1 X Dual USB Rocker Switch 1 X Wiring Harness