Please note:We only stock the upgraded V3L version of this product — not the standard version.What’s the difference between Standard and V3L?Standard Version: Features a small capacitor in the centre of the repeater, which protrudes slightly from the surface.Upgraded V3L Version (What we stock): Uses integrated capacitive plates, eliminating the need for a protruding capacitor. This results in a completely flat, passive repeater — more durable, more discreet, and easier to install in tight spaces.What is a Resonance Repeater?A resonance repeater is a passive circuit tuned to a specific frequency — in this case, 13.56MHz, which is the standard operating frequency for high-frequency (HF) RFID and NFC devices.When placed in a 13.56MHz field, the repeater picks up and “repeats” the signal, extending the effective read range of compatible devices.How can I use this?The V3L repeater can be used to extend the NFC/RFID read range through materials or obstructions, such as:Thick phone casesWallets with multiple cardsClothing or glovesPlastic or wood enclosuresIt works by amplifying the field between the NFC reader and the target chip or tag.How much range does it add?Performance varies based on the device and environment, but general observations include:Keycards: ~2–3× original rangeSmaller fobs: ~2× original rangeRFID implants/tags: ~5–9mm additional read distancePopular Use Cases:Placed between a phone and case to improve NFC read reliabilityInside a wallet to scan keycards without removing themIntegrated into gloves to read NFC implants in handsHelps resolve known NFC issues with the Nothing Phone (2)Where should I place it?This repeater can be used with any 13.56MHz reader or NFC-enabled device. For optimal placement, check out the Dangerous Things Community Wiki, which provides guidance on best placement locations by device: https://forum.dangerousthings.com/t/wiki-repeater-placement-guide/22549