This USB reader for RFID cards can output ID number in output software (such as notepad, WORD, EXCEL, etc editor)., reader connect with Android mobile phone through Micro USB interface，LED color in blue ，it means reader is waiting for reading cards., Open output software(such as memorandum/Note editor) in mobile/tablet, put card close to reader，will output the ID card number in output software, and enter a new line.
