SMOOTH PRECISIONStylish & slim designSmooth ‘touch’ scrollingFits perfectly with even the thinnest notebook3-button optical mouseTouch sensitive surface for scrollingSpecificationsInterface: USB 2.0Optical resolution: 1000 DPIDimensions: 106 x 55 x 22 mmNet weight: 50 gSystem requirementsWindows XP/VISTA/7/8Free USB port