ProtoArc Wireless Bluetooth Trackball Mouse, EM02 Two Adjustable Angle Ergonomic Rechargeable Computer Ball Mouse, 3 Device Connection, Thumb Control and Smooth Tracking for Laptop, PC, Mac-Gray

Customers find the trackball mouse superior to a regular mouse, with flawless functionality and ergonomic design that eases wrist pain. The mouse is comfortable, easy to use, and has no connectivity issues, with one customer noting its ability to control three different devices. The smoothness and button responsiveness receive mixed feedback, with some customers describing it as smooth while others find it not smooth.