Kensington Expert Mouse 4.0 Trackball Apple Rescue of Denver » Products Page » Products for Non Apple Computers » Kensington Expert Mouse 4.0 Trackball PS/2 Kensington Expert Mouse 4.0 Trackball IBM PC’s, PS/2’s & compatibles Windows compatible Trackball appears to be in good condition, but I have no way to test it, so sold as-is Product in stock Price: $15.00 Updating cart... Updating...