. Taiwan R & D wafer， precise positioning. High resolution. USB cable plus up to 150 cm. Simple design， science and technology style fashion show. Resolution 1200 dpi， USB plug and play. Use the vertical scroll wheel， makes it easy to browse the Web and read the file. Symmetrical design， the left or right can be applied. System Requirements: Windows 7 / Vista / XP / ME / 2000/98/95 / NT / Linux Red Hat Linux