Kensington 64378 PilotBoard Multimedia USB/PS2 Keyboard (PC/Mac) Features a convenient side wheel that zooms or scrolls, and a user-switch key that provides instant transition between multiple users Innovative "F" hot key toggles between standard F-key functions and alternative time-saving functions Works with either USB or PS/2 ports to provide all the functions required by both PCs and Macs Backed by a five-year manufacturer's warranty and free technical support Combines one-touch multimedia functionality and elegant, space-saving design for both PCs and Macs