There are three R502 SPY reader manual:

  Level 5 Headline   
 R502 SPY reader Debug User Manual
 R502 SPY reader supports not only contact cards compliant with ISO 7816 but also contactless cards compliant with ISO 14443, and has ISO14443 TypeA protocol debug function and Mifare command debug function. It also provides the online update feature. We will launch more protocol debug function in the future.
     Click Here to get more information about R502 SPY Reader Debug command.
  R502 Spy Library API Manual
       R502 Spy Library is an operation API library of R502 SPY reader. Now it contains ISO14443 TypeA protocol debug API interface, Mifare Classic card command debug API interface.
     Click Here to get more about R502 Spy API usage.
  R502 SPY Reader Upgrade Manual
       R502 SPY Reader Upgrade Manual shows how to upgrade R502 SPY Reader to the latest version.
       R502 SPY reader is developed by JavaCardOS Technologies.
        It is based on Feitian R502 smart card reader. 
        It supports not only contact cards compliant with ISO 7816 but also contactless cards compliant with ISO 14443
        ,and has ISO14443 TypeA protocol debug function and Mifare command debug function. 
        It also provides the online update feature. We will launch more protocol debug function in the future.  
      //[[martinmabel@gmail.com|mabel]] 2017/04/19 10:01//