3 In 1: Car start/Battery detection/Generator performance detection, super capacitor emergency start power supply SC-400, starting current 400-1000A, 12V vehicle model is not limited. Car Battery Detection Function: After the car starts, it can automatically detect the performance of the car battery and generator. Car Alternator Automatic Detect Function: When the car is successfully started by jump starter, jump starter will automatically detect the performance of the car battery and car alternator, and display testing data. This function can better determine the source of the fault that the car can't start. Fast Charging: 15 seconds super fast charging, real-time display of capacitor voltage. Real-time display of input voltage/current during charging. The charging current value is displayed in different colors according to the current size (when charging, the input current value is less than 1A, the red word is displayed, the 1-2A current value is displayed in yellow, the 2-3A current value is displayed in blue, and the current value greater than 3A is displayed in green).     Accessories: 1* Car emergency starter, 1* Charger, 1*User manual.