PD3.0+QC3.0/4.0 Fast Charging BlocksThe USB C charger block support PD 3.0/4.0 and QC 3.0 fast charging technology, which can meet most of devices with fast charging with a total power of up to 40W. The USB A port offers an output power of 3.1 A/5 V, while the USB-C port offers a charging speed of 20W. Charge your iPhone devices from 0% to 58% in just 30 minutes. High Speed Charging Blocks for 4 DevicesWith two USB-C ports and two USB-A ports, effortlessly charge your cell phones, tablets, and earphones all at once from a single charger. Connect a single device to charge up to 40W. (The max power of each USB C port is 20W, and the max power of each USB A port is 18W, while charging multiple devices at once, the output power of each port maybe cant reach their max power) Multiple Safe ProtectionThe Multi port USB C Wall Plug works with both US and international voltages and frequencies (100-240V, 50-60 Hz), it built-in safeguards protect your devices against over-current, ov