RollerMouse Pro2- Black Warranty: 2 years from date of purchase OS: Microsoft Windows 7/Vista/XP/ME/98,	 Microsoft Windows 2008/2003/2000/NT 4.0,	 Apple OSX, Apple Mac OS 8.1 or newer Material on wrist rests:	Durable leatherette Cursor speed precision (dpi)	750/1250 Cursor speed selection (dpi)	Switch underneath