RFID Field Detector can be used to identify the presence of an rfid field and identify the frequency of the rfid reader. You can easily identify RFID fields.

RFID Field Detector Description：

RFID Field Detector can be used to identify the presence of an rfid field. You can easily identify the frequency and unknown reader is operating at.

It supports:

    13.56mhz high frequency or nfc reader
    125khz low frequency reader

Features:

    Detects the presence of a #RFID field
    Measure #reader duty cycle
    Differentiate between 13.56MHz HF/NFC & 125kHz LF RFID #readers
    Form factor that fits in your wallet!