To be able to Skype, there is some main pieces of equipment you need. One of the most important pieces is the webcam, which is used to be able to see each other through the computer.
Your computer also has to have all the pieces needed for Skyping.
You also need a speaker that is loud and clearly heard. It is best to have this just in case if their is many people talking at one time, or if the person has bad hearing.
So the people you are talking to can hear you, you need a microphone that picks up your voice very loud and clear.