With newly developed "Mirror Reflection" technology! Other mice reflect light at an angle, losing some light reflection. Our new technology reflects light vertically, losing none of the reflected light. Resolution: 800 dpi Connector: USB Radiofrequenz: 27 MHz Enclosed items Mouse, Receiver, Carry case, User's manual, 2 AAA alkaline batteries Operating Systems Windows®Me, 98, 2000, XP MacOSX (10.2 or later) Color: white