wired Finger Handheld USB Trackball Air Smart Mouse Mouse Mice new for Tablet PC Computer Optical Laptop Desktop

Feature
100% new and high quality
Quantity: 1pcs
Color: Black
Cable grip / desktop dual-purpose track mouse, ergonomic design, comfortable, grip roll a trackball to move the cursor in the hands of the thumb, without supporting plane, sitting position can be adjusted, or like an ordinary optical mouse placed used on the desktop.
The use of two methods can be used alternately, can greatly ease the long-term use of the mouse caused by the wrist and cervical pain, prevent the mouse.
USB interface, plug and play
Compatible with all of the operating system windows and Linux, Unix, Mac systems, etc.
Package includes:
1 x track ball mouse