USB port: 5V500mA Output socket: ABCDEFG type optional Products Description : CARSPA mini car inverter ... such as laptops, DC players, phone chargers etc. USB charging port offers an additional choice for user. It ... Input & output isolation·Muti-protection function·USB output port: 5V500mA ( optional)·Socket type : A,B,C,D,E,F,G ... ,RoHS, E-markWarranty18 monthsNote: if without USB, the model is CAR7502