Use an ATMega16U2 instead of the ATMega8U2 chip.
Faster transfer rates and more memory.
No drivers needed for Linux or Mac.
The ability to have the Uno show up as a keyboard, mouse, joystick, etc.
2013 New Version

Technical Details

Product Details

Product Dimensions

Package Dimensions
Width : 4.21 inch
Height : 0.71 inch
Length : 4.41 inch

Item Weight: 0 ounce (View shipping rates and policies)
Shipping Weight: 4 ounce (View shipping rates and policies)

ASIN : B00CF2REXC