[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.[ All Metal Material Body]- – Made of Aluminum alloy with better heat disation, which has advantage of non-flammable, wear resistant and good stability. Upgraded metal car charger will not be overheating at high temperatures, which is safer than plastic one.[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, recreationa