... 125KHz LF and 13.56MHz HF RFID proximity desktop readers and writers.YHY101U is 125KHz desktop reader only, with USB interface.YHY202D is ... , with USB interface.YHY632AR is 13.56MHz ISO 14443A desktop reader and writer, with RS232 interface.YHY638 AU ,YHY638FU is ... 13.56MHz desktop reader and writer, with USB interfaceFAQ:PaymentntEscrow, PayPal, T/T ...