3 basic parts you need :

RFID Tag

RFID Reader

RFID data collection software



RFID Readers usually combine a transmitter,receiver and microprocessor into one unit , some readers also have the antenna combined into the RFID Reading Unit.
RFID Readers are also know as
Readers
Interrogators
Transceivers
* RFID Reader Antenna should not be placed closer than 9 inches or 23 cm from RFID Personnel