Surfing the internet, editing documents or playing games on your computer by using traditional mouse which can turn into painful experiences. USB Wireless Trackball Mouse is designed to reduce such injuries. You can get used to control it easily and rests comfortably in your hand. The scroll wheel is operated by your thumb, while your index finger is used for 'clicking' those two buttons underneath the body of the fish mouse. It works without the need for flat surfaces and the wireless design, which makes it ideal for people who are working in restricted areas.