4. Suitable for mobile phones, tablets, GPS and other USB devices. 3. With a button switch to turn the power on/off, saving; 1. This is QC3.0+PD Type-C smart fast car charger; 2. LED Voltage display]can monitor car battery voltage status in real time to prevent personal safety and property damage from battery failure. 5. Applicable for 12V/24V car, motorcycle, RV, trailer, truck, boat, etc.