Logitech Optical Trackball Marble Mouse

- Logitech USB/PS-2 4-button Optical Marble Mouse General Features: - USB interface (includes USB to PS/2 adapter) A comfortable design for either hand - Precise fingertip control Four buttons Trackball Precise optical technology Easy to install and set - 5-foot cable length Regulatory Approvals: FCC CE C-Tick VCCI TUV BSMI NOM MIC cULus