Logitech Optical Mouse with Red Marble Trackball

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