RFID readers / writers are radio frequency identification, can automatic recognize the target and access to relevant RFID signal data without human intervention, besides it’s easy to operate, can identify fast moving objects and identifying a plurality of RFID tags. RFID reader / writers have fixed type and hand held type. The hand held type RFID reader / writer includes a low frequency, high frequency, UHF, active and so on. Generally, RFID reader / writer apply to yard management, it realize the identity of the vehicle identification, automatic deductions. If apply to long – range RFID readers / writers, can realize non-stop and avoid taking cards services or unattended channels.
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