RFID desktop readers are widely used for loyalty management, Payments, or card issuing field. There are many readers to support different RFID technology, including LF, HF and UHF. GYRFID presents different kinds of RFID Card readers to support the RFID tags and tags working. We provide The DLL under the WINDOWS2000, WINDOWS NT, WINDOWS XP and LINUX. We also provide code samples programmed by VC++,Delphi, or VB which enable users have a speedy develop for the products.