Wireless trackball mouse for desktop or laptop computers 2.4 ghz wireless connection provides quick response with no lag Smooth-rolling trackball feature gives you expert control and alleviates hand and wrist strain Includes top scrolling dial, programmable buttons, and right and left-click mouse buttons Wireless range of up to 30 feet; great for group gaming, presentations, and more Compatible with Windows 7,8,10. Mac OS 10.11, 10.12, 10.13 and above