... -and-Play 3.Upbeat Simplicity 800 dpi Optical Mouse(MS-09)Specification MaterialABS Plastic ColorGreen,Black,White Size90×50×30mm Precision800dpi Line length150cm ... ,control more accurate6.Oval pads, smooth operation, unimpeded sliding7.The USB Port, plug and play, no need to drive the program ... question, pls feel free to contact us at any time !! Optical Mouse (MS-09)