** Digital Research 3 Button Serial/PS2 Mouse - Retail Boxed ** In Color Retail Box -Specifications- *** 3 Button Serial or PS2 Mouse by Digital Research *** - Serial & PS2 Interface - Super High Resolution 400-4000 dpi - Fine controll and the ability to travel across the screen at the flick of your wrist - Eronomically Shaped, Designed to fit your hand for hours of comfortable use - Microsoft® and Mouse Systems Compatible - Programmable for left handed use - Plug and Play - New Retail Boxed