Here is my warning to all potential buyers, this was the first Razer mouse that I ordered for my logitech g5 gave up the ghost (after 7 years!) The mouse has the following 2 main problems 1) The software with which one can supposedly save profiles for Games and link it to the game just does not start, even after several updates it does not work that the correct profile is loaded 2) The mouse itself has often spinning mills, which manifests itself in that the mouse cursor erratic and does not respond as expected to move the mouse, this is especially annoying when you play online (especially LoL) I could find no connection, except that it seems to do so is when you lift the mouse from the base ...
This does not occur so often that the mouse would be unusable, but if someone is faced with the choice, then I strongly recommend to take a different mouse, saves nerves and time!