Eclipse Mobilemouse Wireless Laser Mouse, Black: * 2.4GHz wireless with up to a 30" range * 1600 dpi laser technology for smooth operation on a variety of surfaces * Low profile scroll ball for effortless 4-way scrolling with audible click feedback * FlexGrip 2 stage height adjustment * Nano dongle is storable inside the mouse * Color: Black * Compatibility: Windows XP/Vista/7 and Mac OS X