This is similar to your standard PlayStation 2 controller; two thumb-sticks, a D-Pad, 4 buttons, 4 triggers, start and select.

But wait, that's a whole lot of control!
Use this with your next project to control ground vehicles, air vehicles, on-screen elements, killer robots,  or just about anything you want.
Check the link below for an article on interfacing this controller with an Arduino. There's even an Arduino library available!

Documents:

• Arduino Project
• Arduino Library