Quick Charge 3.0: USB car charger adapter socket designed with dual USB ports supporting QC 3.0, whose max single output is 18W. Built-in official smart chip, will intelligently detect your devices and simultaneously charging 2 devices at optimal current. Charge compatible devices up to 4 times faster than conventional charging. LED Voltage Display: USB car charger adapter socket builts in digital LED voltage monitor, it can display accurate voltage status of your vehicle’s battery at the real-time. Preventing low voltage from affecting normal operation. The LED light is blue and can be clearly seen in the dark.It is compatible with most vehicles with a voltage of DC 12-24V connections Material: This USB charger socket is made of advanced aluminum alloy material and will not overheat in high temperature environment. It has good heat disation performance, non-flammability and wear resistance. The waterproof cover can effectively protect the switch, and the current voltage value c