[minnan] Tiny portable dual-frequency RFID field detector by Proxgrind

Introduction. The RFID Field Detector detects and displays the presence of Low Frequency 125KHz and High Frequency 13.56MHz fields. Designed to be compact and discrete, it fits neatly onto your keyring. The RFID Field Detector is an indispensable tool: Pentesting: Perform rapid access control reconnaissance. Development: Debug your hardware firmware. The device requires no batteries. When in the presence of an RFID field, an LED indicates the frequency of the field. Introduction. The RFID Field Detector detects and displays the presence of Low Frequency 125KHz and High Frequency 13.56MHz fields. Designed to be compact and discrete, it fits neatly onto your keyring. The RFID Field Detector is an indispensable tool: Pentesting: Perform rapid access control reconnaissance. Development: Debug your hardware firmware. The device requires no batteries. When in the presence of an RFID field, an LED indicates the frequency of the field