RFID Field Detector Ultra — LF / HF / UHF

Before you run RFID attacks, you need to know what's actually transmitting — and from where. The RFID Field Detector Ultra is a tri-band passive field indicator that lights up in the presence of LF (125 kHz), HF (13.56 MHz), or UHF (860–960 MHz) fields. Identify hidden RFID readers embedded in turnstiles, door frames, and retail fixtures without touching them. Confirm that your Chameleon Ultra, Proxmark3, or iCopy-X is actually radiating signal before you start debugging your firmware. Locate reader field dead zones to understand optimal card placement distance. No batteries required — powered entirely by the field it detects. Pocket-sized and infinitely useful for any RFID engagement. Made by Lab401.

Frequently Bought Together

Chameleon Ultra

Chameleon Ultra

Simultaneous LF + HF RFID emulation, 8 card slots, MIFARE cracking built-in — the only emulator that does it all.

$300.00

Proxmark3 RDV4

Proxmark3 RDV4

The gold standard for RFID/NFC security — read, clone, sniff & emulate any card.

$549.99

ARD RFID Blocker NFC Jammer — Pack of 2

ARD RFID Blocker NFC Jammer — Pack of 2

Active NFC/RFID jammer — credit-card sized, no battery, blocks 13.56 MHz across your entire wallet. Pack of 2.

$45.00