The adapter is a USB power adapter with a 3‐pin plug. It has a USB‐A female socket on one end and a standard 3‐pin electrical plug on the other end. You plug the 3‐pin side into a wall outlet and insert a USB cable (or device) into the USB‐A port to charge or power a device using the electricity from the socket. It’s commonly used for charging phones, powering small electronics, or supplying power to gadgets like the mini steam iron shown earlier.