"Not just any hand mirror. These hand mirrors allow visual communication between each other. When opened, you will see a magic interface appear on the bottom portion. This will allow you to look at the contact list of those currently in the link. There’s still more work to be done to add more, but currently it will have our entire group in the list." I opened my own mirror, which had a symbol of a New Moon on the front, and went through the list. Finding Harry, I tapped on it. "The top mirror will then change and link to the person you selected. They will have to answer, but when they do, their image will appear there. Allowing you to speak to them like they are right next to you."