Wireless Index Finger Trackball This index trackball provides accurate and smooth tracking, allowing for easy navigation through documents and web pages. You no longer need to move your arm for the movement of the cursor. Your index finger will control the cursor instead. It will effectively reduce fatigue and strain on your wrist and arm. Rehcargeable Mouse Type-c charing port INDEX FINGER TRACKBALL large size trackball for more precise control One mouse for threee devices Do you havewrist pain?/ The design of the ultra long hand rest allows this mouse to fully fit your palm, it can reduce arm strain and keep your hands in the most comfortable position at all times Whisper-quiet Click Trackballs in different positions ProtoArc EM01 keep your palm in a nutural position ProtoArc EM03 free your thumb and wrist