Lot Of 50 Pieces Optical PS/2 Scroll Mouse Black. This PS/2 mouse is maintenance free! The optical tracking provides accurate response at 400 dpi and you will never have to clean the mouse ever again! The ergonomic design and 3-button layout will have you working comfortably and efficiently.
PS/2 Optical Scroll Mouse
Scroll wheel acts as third button
700 mm per second tracking speed
5-foot cord (approximate)