1 can read 1-3tracks 2 can connect any kinds of terminals This device can read three tracks in the same time.Varies of data standards such as ANSI/ISO and IBM are contained in one reader,which can be recognised automatically.Perfect compatibility :this reader can connect any kinds of terminals,such as shida,guoguang,GreatWall,mudan,huizhi,juxing,haiwei,newsun,changlin,new mainland,ronghe,lenovo, ...