description:...featuring advanced laser technology, the Traveler 100V Laser works reliably on most types of surfaces and offers much higher tracking power than regular optical mice.You can switch the resolution of Traveler 100V Laser to 1600 or 800 dpi while pressing the right, left and middle buttons togetherfeatures:- sensitivity adjustment to 1600 and 800 dpi resolution- works reliably on glossy or uneven surfaces- suitable for both hands- port: USB or PS/2system requirements:- PC Pentium 233 compatible or higher- Windows 2000/XP/XP x64/Vista or MAC OS X 10.2.8+- available USB- or PS/2- portpackage content:- Traveler 100V Laser mouse- quick quide- USB to PS/2 adapterspecifications:- interface support: USB or PS/2- system support: Windows 2000/XP/XP x64/Vista & MAC OS X 10.2.8+- three buttons + scrolling- wheel- resolution: 1600/800 dpi laser engine- dimension: 116x62x37 mm- giftbox size: 210x160x57 mm- body weight: 105g