Interface: USB                                                                                                            2> 3 Button, 1 wheel optical mouse, wired                                                                                  3> High resolution: 800DPI                                                                                                  4> Button life over 5 million times                                                                                        5> Compatible with Windows 95/98/2000/ME/XP/NT/Visa/Win 7, etc.                                                                                                           6> Comfortable hand touch feeeling, sweat absorbing, unique look