The 9.5' USB Optical Mouse from HP is for use with specific Tower Workstations. It utilizes optical sensing technology, recording precise motion over a variety of surfaces without a mouse pad.
Compatibility
HP Compaq 4300 Pro AIO, Z230 Tower Workstation, Z230 SFF Workstation, Z420 Workstation, Z620 Workstation, Z820 Workstation, Z1 AiO Workstation, Z1 G2 AiO Workstation, Z440 Workstation, Z640 Workstation, Z840 Workstation
General
Reduce sticking and constant cleaning with optical tracking - a system that works through light with less moving parts for durability than ball-based mice
Smooth and contoured in shape that fits both hands and a wheel that functions as a third button
Scan rate of 800dpi and enables crisp motion without a mouse pad, ball, or roller