EM card reader machine

Support cards: EM4100 or other compatibility RFID cards.
Data format: four bytes list number should be translated into ten algorism format, then hit enter keyboard finish it.
Communicate format: RS232 (9600/1200, N, 8, 1), ASCII coding (or expand keyboard code)
Reading distance: more than 80mm.
Reading cards time: less than 100MS.
Out put entrance: it is common used to serial interface.
Power supply: keyboard supply power.