seenda Wireless Ergonomic Bluetooth Trackball Mouse BlackThis trackball mouse features an ergonomic design that follows the natural curve of your hand, helping reduce wrist strain during long work or study sessions. The contoured shape fits comfortably in your palm while the thumb-controlled trackball lets you navigate without moving your entire arm. Perfect for users who want a comfortable, efficient alternative to traditional mice.Itemweight0.44 poundsProductdimensions4.0 x 2.2 x 5.4