Roadster Car charger compatible with all USB Powered devices including Android, Apple smartphones and tablets.Dual ports car charger(QC3.0+5v/2.4A) simultaneously charge two devices at highly efficient speeds, with protection from over-current, over- charging, and short circuiting. Charge risk-free without any risk of overheating or damaging your devices. It is backward-compatible with QC2.0 and QC1.0 devices, provide standard charging for non-quick charge devices. QC3.0 can be implemented with USB Type-A, USB Micro, USB Type-C and proprietary connectors. Qualcomm quick charge 3.0 charges up to 4 times faster than conventional charging and charges twice as fast as quick charge 1.0 and up to 38% more efficient than quick charge 2.0 technology.