You can use several input devices with the X Window System (and thus with KDE). You can change their settings here:
Here, you can set whether a character is repeated when you keep pressing its key. If you have a bad keyboard and need the clicking after you hit a key, you can also turn on the key click volume.
The Mouse is the most frequently used pointing device around, and for the majority of computer owners, the most intuitive method of navigating through KDE. (For some owners with bad mice, it is also a reason for visiting the doctor very often, see Drag & Drop for information.)
Sets the speed of the mouse. The higher the setting, the faster your mouse will move around the screen.
Threshold is the distance the pointer must move (in a small amount of time) before accelerated movement occurs. 0 disables it.