... RS232 and USB port connections. It is used as a contactless smart card reader and writer in generally, The D8 includes RS232 ... be accessed on request. It is mainly used in parking-meter, door-control, Health care—medical identification, transportation, oil-control, access ... 98/me/2000/NT/XP, UNIX, LINUXoperating distance (contactless)up to 5 cm typical 2.5 cm D8-U Contactless Smart IC CARD READER