Basic Computer Accessories
You can attach keyboard and mouse devices to a PlayStation 2 via the USB ports. These items may be useful when you are inputting data or chatting during online game play. You can also buy controllers with built-in keyboards.
Microphones and Headsets
Some voice recognition devices such as microphones and headsets have USB cables that allow you to connect them with the PlayStation 2. With these, you can chat with other players online without taking your hands off the controller.
Sony EyeToy
Motion sensor devices such as the Sony EyeToy will also link to your system through the USB ports. The EyeToy is comparable to a basic webcam. It allows you to interact with video games through motion detection and comes with a built-in microphone.