3.0 FAST CHARGE TECHNOLOGY4 ports=3 ports 2.1A+1 port QC3.0. Quick Charge 3.0 fast charge technology, backward compatible with QC2.0; for devices to be charged that do not support fast charge, adaptively allocate a larger current to achieve fast charging. HIGH-QUALITY MATERIALBuilt-in smart circuit design to prevent short circuit, overheating, overcurrent, and overcharge. Designed with fireproof materials, safe and reliable. WIDE COMPATIBILITY4 Ports are suitable for various mobile phones, Compatible with iPhone 13/12 Pro/12 Pro Max/12 mini/11/11 Pro/11 Pro Max/XS/XR/XS MAX/X/8/8Plus, Samsung S21/S20/ S10/ S9/ S8/ S7/ S6/ Note10/ Note10+/ Note9/ Note8/ Note7, tablets, driving recorders and more USB devices. EXCELLENT SAFETYHigh-quality structure, sturdy casing and protection against overcharging, overheating and short circuit. When the battery is fully charged, charging will automatically stop. SMALL AND PORTABLEMeasuring 3*1.2", The ultra-small design of the car charger saves space and allows seamless access to the rest of the dashboard.