The latest endoskeleton design from Logitech G achieves an unreal 80-gram weight. -Removable left and right side buttons make PRO Wireless truly ambidextrous, and let pros decide how many side buttons they wantfrom zero to four. -16.8M color customization thats perfect for representing your team colors, personalizing your setup. -With an onboard memory, you can use G HUB to save your preferences directly to the mouse for fast and easy use on tournament systems. -Incredibly accurate, consistent and tight feel for every click with a metal spring to tension separated left and right button keyplates -The surface of PRO is coated for durability and grip while the feet are tested to perform for over 250 km of use.