Compact and ergonomic easy-to-grab design, Estilo GT RF 2.4Ghz Mouse also features 2 LED headlights which light up when the mouse is powered. The mouse resolution to 500dpi, 800dpi or 1600dpi is easier to change by clicking the Left and Right buttons simultaneously. Features: On/Off switch design Mouse resolution is easily to change by clicking the Left and Right buttons simultaneously Interface: USB2.0 Resolution: 400/800/1600dpi Frame Rate: 3200fps Receiving distance: 10m Working Frequency: 2.4GHz 2.4GHz wireless transmission technology, allows a distance up to 10m between receiver and mouse Browse Way: Vertical + Horizontal Scroll Support Window ME/2000/XP/Vista, Mac OS X10.2 Dimension: 114 x55 x36mm (approx.) Weight: 65g Package Contents: Estilo GT RF 2.4Ghz Mouse USB Receiver AAA Batteries x 2 User's Manual