The Unitech MS240 features triple-track reading and can read cards swiped in both directions. An LED provides feedback to the user indicating ready to read or read error. The MS240 is also easy to configure and use: No programming, software drivers, or external power is required. Just connect the reader to the keyboard and the keyboard port or a USB port on almost any PC or Mac and you're ready to read magnetic stripe cards. Data is read from the card and sent to the PC or Mac just as if it were entered from the keyboard. The MS240 is low-power CMOS, so no external power source is required.