The feature is also available in the Kone[+], which was released a few months ago, and basically acts similar to shift on a keyboard. You can assign two actions to each button for a maximum of 16 functions, just hold down the EasyShift[+] button on the mouse and press one of the other standard buttons at the same time to execute the secondary function.
In terms of specs, its optical sensor can be configured at 400, 800, 1600 or 3200dpi, maximum acceleration has been raised to 30G, and just like the current generation of all other Roccat gaming mice if features a 1000Hz polling rate. It also features a multi-color lighting system like its predecessor, but appears to have dropped its signature driverless operation for a new built-in feature-rich Roccat driver package to make setting up game profiles easier. No specific launch date was mentioned other than January 2011 with the Kova[+] priced at €50 (about $65).