... support ISO14443 TYPE A card with RS232 interface Ehuoyan supplies 125KHz LF and 13.56MHz ... .56MHz desktop reader and writer, with USB interface.YHY632AR is 13.56MHz ISO 14443A desktop reader ... and writer, with RS232 interface.YHY638 AU ,YHY638FU is 13.56MHz desktop ... Typical time to read and write cards<100msCommunications Interface:RS232, baud rate 4800 115200 bpsPower supply ...