[action]
[She takes off her communicator so that she can point to the appropriate buttons as she explains. They both speak the same language, so it's not like she needs to wear it around him anyway.]
The communicator is a device that allows us to speak to one another over great distances. Whatever you say through this device can be heard by anyone else who has their communicator with them, unless you press this button here to make a private or filtered message. You can use this other button to show an image, which is called a video. Lastly, this button here allows you to turn on the map.
[Did you understand what I just told you? >yes   no]