Tiny Portable Dual-frequency RFID Field Detector By Proxgrind
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.