USB Charging Ports QC3.0 USB car charger has two QC3.0 30W charging ports, the port offers the fastest charging efficiency up to 80% in 35 minutes, 4x faster than the charger normal. . Cigarette Lighter Socket A cigarette lighter socket can supply DC 12V power and charge a dash cam, GPS, heated seat, vacuum cleaner, car humidifier, air pump, air purifier, etc. . LED Voltage Display The digital LED voltage monitoring function allows you to monitor the status of your vehicle's battery and electrical system in real time. . Power switch Updated USB socket panel designed with an on/off switch to save power, protect devices and increase device life. It retains electricity and does not consume energy when extinguished. . 10A fuse Protects your devices against overcurrent, overload, overheating, overvoltage, undervoltage and short circuit. The product is suitable for most vehicles with DC 12-24V voltage. .