more mouse cords to get in the way. Mouse operates up to 3' away from receiver. Two channels with 256 changeable Link IDs per channel for interference-free operation. Features five buttons, including three programmable, Scrolling/zooming wheel and a Smart Mouse sleeping mode that conserves power. Comes with two ""AAA"" batteries, adapter for PS2 port and DVD programming driver. Compatible with Windows 95/98/2000/ME/NT/XP"  (less)