[Dual QC3.0 USB Ports] This car usb charger has dual 18W / 3A QC3.0 charging ports, which is 4x faster charging ports than conventional chargers. Compatible with Quick Charge 2.0 and 1.0. Suitable for all popular USB devices. [ON / OFF Switch] The car usb socket is built in with an on / off switch for power control, which can save energy and extend the life of the product and devices. It saves electricity and does not consume energy when it is turned off. [Digital Creative LED Indicator ] The LED indicator likes a classic clock, which is easy enough to check if the connection is successful and allows easy operation in dark environments. [Water and heat resistant] Made of advanced ABS materials with IP66 sealing, the 12v car socket works well in high and low temperature environments (from -40 C to +60 C). Suitable for most 12-24V DC vehicles such as cars, boats, bicycles, SUVs, ATVs,recreational vehicles, motorcycles, etc. [Simple installation] Installing the USB socket is very simple: "+" is inserted in the positive pole and "-" is inserted in the negative pole. It can also be connected to an on / off switch to save energy.