Shop name:Chong Qing Shuo Yue Ke Ji You Xian Gong Si Handheld Wired Mice Mouse Dual and alternative usage way, off-table or placing on the table. It can greatly ease the harm of palm joint or muscle for long time using mouse Thumb-controlled trackball Connects via USB Port This Wired Trackball Mouse's unique shape makes it can be used in two ways: hold in hand or place on desktop. You can adjust your posture freely, even if you are sitting on sofa or lying , you can also it conveniently, especially when you are in the narrow space, like in the car, train or in the plane. Plug and play, no software required Cable Length: Approx. 6.56 ft / 2m Desktop Resolution: 1200dpi Trackball Resolution: 1600dpi Material: ABS Package Content:1 x Wired trackball mouse Note:Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.