A radio frequency identification (RFID) apparatus includes a housing, an RFID reader, and one or more RFID antennas disposed in the housing. The housing includes a first opening, a second opening, and a tunnel between the first and second openings. The housing is configured to be disposed over a track configured to transport a garment on hanger through the tunnel. The RFID antennas are configured to generate a first RFID signal substantially in the tunnel to interrogate an RFID tag associated with a garment on hanger as it transits through the tunnel. The RFID reader receives a second RFID signal transmitted by the RFID tag in response to receiving the first RFID signal. The RFID apparatus can include a segment of the track. The track can include a trolley configured to secure one or more garments on hangers. The trolley can include an RFID tag.