QC3.0 USB Charging Ports:Thlevel car usb charger has dual 30W QC3.0 charging ports, the port delivers the fastest charging efficiency up to 80% in 35 minutes, 4x faster than normal charger. Cigarette Lighter Socket:One cigarette lighter socket can offer 12V power and charge dash camera, GPS, seat heater, vacuum cleaner, car humidifier, air pump, air purifier, etc. LED Voltage Display:The digital LED voltage monitoring feature 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 the life of the devices. It retains electricity and does not consume energy when turned off. 10A Fuse:Protects your devices from over-current, over-load, over-heat, over-voltage, under-voltage and short circuit.The product is suitable for most vehicles with 12-24V voltage.