Handheld Intelligent Multipurpose Trackball Mouse
Hand-held multifunction intelligent mouse is a new generation ergonomic invention, combining optical mouse with trackball mouse.
Its unique shape makes it no need of plane support.
You can adjust your posture freely, even if you are sitting on sofa or lying down.
You can also use it in narrow space, like in a car, train or airplane. And it can greatly ease the harm of palm joint or muscle for long-time using mouse.