This is a used Sony USB wired mouse "VGP-UMS32". It's a USB mouse that came with VAIO computers during the Sony era. The right and left click functions work without any problems, but the scroll wheel is not functioning. Scrolling the wheel does not scroll the screen. The laser on the bottom is working, and the cursor moves when the mouse itself is moved. This is for those who need it for parts or for those who can repair it.