1.Port:PCMCIA CARD; 2.Support Windows opteration sysytem;3.Support Windows Operation system;3.No need driver (except Windows 98/98se); 4.No extra power supply;
1.Port:USB2.0,compatible with USB1.1; 2.Support Windows operation system;3.No need driver (except Windows 98/98se); 4.Adopt saving design,no extra power supply;5.made of alnico,not easy to wear and tear.