This is an NES to USB adapter. 

• Plug and play install, no drivers needed
• Compatible with Windows™ 2000/XP and MAC OS 9/X
• Use two or more for multi-player gaming

Works with standard controllers (original, max, dogbone, etc), does not work with peripherals (Zapper, FourScore, etc).

For a more in depth look at the product check out the video...