CE Compass Mini 800DPI USB 2.0 3D Optical Finger HandHeld Mouse Mice For Laptop PC Notebook Ergonomical design - Reduce fatigue effectively USB interface, Plug-and-Play, no installation need No mouse pad required, sliding on any surface Real hardware resolution 800dpi - fastest and best buy for professional designers and game fans 3D internet wheel fully supports the wheel operation functions of Windows OS series Fulfill the autos-roll and zooming function etc by its own drive Digital encoder technology, operate precisely, prevent faulty movement effectively Power Supply: PC power Mouse type: 3D Optical Finger Mouse Interface: USB Button: 2 Buttons + 1 Scroll Wheel Color: Black