Charge your devices up to 4X faster than other conventional car chargers with Robust-QC3, a4.8A heavy duty car charger with 2 ultra-fast charging ports. The QC 3.0 port is engineered to be up to 45% more efficient than Quick Charge 2.0. The USB charging ports built into Robust-QC3 adapt to your devices to provide the safest maximum charging output per port.