Wired gaming mouse with weight adjustment and 7 buttons The ergonomic design ensures exceptional comfort even during prolonged sessions. Designed to adapt to every need, once you try it you won't be able to do without it. The mouse contains cavities used for inserting weights which allow the overall mass of the mouse to be adjusted. This allows you to adjust the mass of the game controller to your liking. Four identical weights have a mass of 6 grams each.