4-Port 100W Output: You can charge for 4 devices simultaneously. With QC3.0 & PD3.0 fast charging protocol, you can charge your laptops, tablets, phones, AirPods etc at the same time. Single USB-C port can reach up to 100w, while using all ports, the usb-c port still can provide up to 45W. It really charges fast and saves time. Safe Assurance: Smart built-in chip protects against short-circuiting, over-current, over-heating and over-charging. When device is fully charged, it will automatically stop charging and your device will be protected safely.