20 watt apple orginal adapter

The Apple 20W fast charging for iPhones optimal charging for iPad Pro/Air,

providing 20W minimum output via a USB-C port,

accepting 100-240V AC input, and delivering around 9V DC/2.2A for fast charging, though it also supports 5V/3A, ideal for various USB-C devices and meeting global safety standards. 
Key Specifications:
Model: A2940 (one version)
Input: 100-240V ~ 50/60Hz, 0.5A
Output:
Fast Charge: 9V DC / 2.2A (approx. 20W) 
How it Works:
This adapter uses USB Power Delivery (PD) to communicate with your device and deliver the optimal power, ensuring fast and safe charging for supported devices like newer iPhones and iPads, while also working with other USB-C gadgets.