The most important thing above all: it is compatible with Apple / Mac products !! As you'd already read some comments, one may not install the driver, but close all windows pops up unnoticed should the first plugging the USB flash drive. Then he is working properly.
In PowerPoint function and react all keys (ie forward, backward, start presentation and screen darken). In Keynote, however you can only jump back and forth. The two lower buttons only react in presentation mode and cause you to return back to the editing overview. This is a small flaw, but not relevant to me, therefore no point deduction.
