Contour Roller Mouse
Trackbar Mouse came out around 2004.
- 2 high-powered optical sensors (1,000 dots-per-inch)
- 1 USB port, 1 microphone port
- Delivered with 1 USB cable and 1 microphone cable
- Six Programmable Buttons
- Clickable function on the roll and a clickable scroll wheel
amazon has mixed reviews.
better is Contour Roller mouse.