Near-frictionless scroll wheel Selectable mouse cursor speed Fast and accurate positioning when you are using it Easy to install, plug and play System supported:windows 2000/XP/Vista/ Windows 7/ Windows 8/Windows 10/linux/mac Laptop PC Computer Optical Hand-Held USB Trackball Mouse Mice Win 7 OS Feature : 100% brand 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. Resolution: desktop 1600DPI, track ball 1200DPI The length of 2 meters Product size: 10.5cm * 6.5cm * 5cm; Package includes: 1 x track ball mouse (with retail package) Brand Not Specified SKU 100582701_NP-1020994326 Model CJX60808843