"Whoa slow down. Most muggle technologies won't work within too much magic. So I can't use it at Hogwarts. Why the Wizarding world doesn't have something similar yet, I don’t know. Maybe Purebloods didn't want to acknowledge that muggles can make something that's better than the tradition. And I can show you where to buy one, but before that, you’ll need muggle currency and a muggle address. For now, you can use my address." she said. 