Here is the short answer:
If you’re holding an HP Wireless Optical Mobile Mouse with the model code (or looking for drivers for it), you might be staring at your computer wondering why it isn't working straight out of the box. HP Wireless Optical Mobile Mouse Driver Fha 3412
– For some HP mice, this software allows you to check battery level, customize buttons (e.g., reassign middle-click or side buttons), and see DPI settings. It is not required for basic function. You can find it by searching for “HP Mouse Assistant” on HP’s software & driver download page, selecting your OS, and looking under “Software-Utilities.” HP Wireless Optical Mobile Mouse Driver Fha 3412: