【Defective Item】 Silent design Bluetooth 5.0 IR LED mouse, Battery operated. Uses AAA alkaline batteries. I was unable to use it with my home computer, so I removed the batteries and stored it in a drawer. There is some dirt or scratches only on the bottom (photo 3). I tried putting in new batteries, and the indicator light came on, but the warranty period has expired, so I am selling it as a defective item. Regarding the supported OS, there may be end-of-support issues, so please confirm before purchasing. Thank you for looking.