ProtoArc

ProtoArc Wireless Bluetooth Trackball Mouse, EM04 2.4G Ergonomic Rechargeable Mice with 5 Adjustable DPI, Thumb Control, 3 Device Connection, Smooth Tracking, for PC, iPad, Mac, Windows [Ergonomic Thumb Trackball] Equipped with a smooth trackball, use your thumb to move the cursor instead of moving your wrist and arm. This will effectively reduce fatigue and strain on your wrist and arm....