Adesso iMouse T40 - Wireless Programmable Ergonomic Trackball Mouse — computers, electronics, china.

• The trackball location allows users to move their cursor by rotating the trackball with…
• With its 5 levels of DPI resolutions (400-4800), the optical trackball provides superior accuracy…
• Its ergonomically contoured large size trackball further completes its ergonomic advantages, making your daily…
• 25" Large Trackball with Optical Sensor - Tracks accurately and precisely with less muscle…
• Removable Trackball - Allows for Easy Cleaning