Ease your wrist or palm joint pain with the EIGIIS wired trackball mouse. Using repetitive motions with a traditional computer mouse for extended amounts of time could lead to carpal tunnel syndrome or exacerbate arthritis pain. This wired trackball mouse has an ergonomic design to help support your hand to stay in one place and moves the cursor without using arm movement. The EIGIIS ergonomic mouse is wired and plugged into your computer via USB. The Left Click is under the hole, the Right Click button is on top on the Right, and the button on the top left is the Lock Browser button.