• No More Muscle Fatigue:The Comfort Mouse moves your wrist into an ideal 24-degree angle, eliminating the discomfort caused by wrist pronation. A thumb cushion encourages a more comfortable grip.
• Driver Free Installation:Plug-and-Play.Compatible with Windows 2000 and newer, and MAC OS 10.4 and newer.
• 1000 DPI optical resolution.
• USB 2.0 cable length is 5'4" / 1.63 m

This mouse supports Windows PC, MAC, various flavors of LINUXand UNIX without requiring 3rd party drivers. The 3 buttons support left andright click with center wheel click to activate scroll function on PC andmiddle click on LINUX/UNIX. 1 to 3 button support for MAC as supported by theOS version.

Using a ruler or tape measure, measurethe distance from the crease in your wrist to the tip of your ring finger. Thismouse will accommodate measurements up to7.25"

**Thisitem has been tested and confirmed to be in good working condition but ismarked open box and sold as-is (no refunds). This item is in VERY GOOD CONDITIONand may have minor superficial blemishes and/or the packaging may be missing ordamaged. Neither of which affect the working condition of this item. 30-dayreplacement available if item is found to be defective due to manufacturerdefect only.

I ship Mon-Fri. Please contact me prior to purchasing with any questions and I will answer as quickly as possible!