{"product_id":"13-56mhz-uid-rewritable-rfid-ic-card-keyfob-changeable-chip","title":"13.56MHz Rewritable UID RFID IC Card Keyfob – 1KB Chip","description":"\u003cp\u003eMeet the \u003cstrong\u003e13.56MHz UID Rewritable RFID IC Card \u0026amp; Keyfob\u003c\/strong\u003e — a compact, versatile proximity card solution ideal for access control systems, smart door locks, time-attendance readers, and hobbyist RFID projects. With a changeable UID chip, you can rewrite and clone compatible card data quickly and easily using a standard RFID card writer.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWorking Frequency:\u003c\/strong\u003e 13.56 MHz — compatible with most standard MIFARE readers\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMemory Capacity:\u003c\/strong\u003e 1KB storage for flexible data management\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRewritable \u0026amp; UID-Changeable:\u003c\/strong\u003e The chip UID can be rewritten multiple times, making it perfect for testing, development, and cloning applications\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompact Keyfob Form Factor:\u003c\/strong\u003e Small, lightweight, and easy to carry on a keyring — slim enough for a pocket or bag\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDurable ABS Shell:\u003c\/strong\u003e Rugged ABS construction withstands daily handling and light moisture exposure\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSelf-Adhesive Coil Option:\u003c\/strong\u003e Includes a coil design suitable for self-adhesive mounting applications\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePassive Power Supply:\u003c\/strong\u003e No battery required — powered inductively by the RFID reader\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBroad Compatibility:\u003c\/strong\u003e Works with standard 13.56 MHz MIFARE Classic 1K readers and writers\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFrequency:\u003c\/strong\u003e 13.56 MHz\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChip Type:\u003c\/strong\u003e MIFARE Classic 1K (UID changeable)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMemory:\u003c\/strong\u003e 1KB\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e ABS\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePower Supply:\u003c\/strong\u003e Passive (reader-powered)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDiameter:\u003c\/strong\u003e 21.6 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eForm Factor:\u003c\/strong\u003e Keyfob \/ Self-Adhesive Coil\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWho Is This For?\u003c\/h2\u003e\n\u003cp\u003eThis rewritable RFID keyfob is a great pick for electronics enthusiasts, smart home tinkerers, security system installers, and developers who need a flexible, reprogrammable card for prototyping or everyday access use. Whether you're setting up a DIY door lock, testing an RFID reader, or managing a small access control system, this keyfob delivers reliable performance in a pocket-sized package.\u003c\/p\u003e\n\n\u003cp\u003eFor more background on RFID technology and its applications in security and identification, visit the \u003ca href=\"https:\/\/www.nist.gov\/publications\/guidelines-securing-radio-frequency-identification-rfid-systems\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eNIST Guidelines on Securing RFID Systems\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What is a UID-changeable RFID keyfob and how does it work?\u003c\/h4\u003e\n\u003cp\u003eA: A UID-changeable RFID keyfob operates at 13.56 MHz and contains a rewritable chip whose unique identifier (UID) can be overwritten using a compatible RFID card writer. This makes it ideal for cloning, testing, and development with MIFARE Classic 1K systems — no battery is required, as it draws power passively from the reader's electromagnetic field.\u003c\/p\u003e\n\u003ch4\u003eQ: Is this keyfob compatible with standard RFID door locks and access systems?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. This 13.56 MHz RFID keyfob is compatible with most MIFARE Classic 1K readers and writers, which are widely used in door access control systems, time-attendance machines, smart lockers, and hobbyist electronics projects. Always verify your reader's chip compatibility before purchasing.\u003c\/p\u003e\n\u003ch4\u003eQ: Can the UID be rewritten multiple times?\u003c\/h4\u003e\n\u003cp\u003eA: Yes — the chip is designed to support multiple rewrite cycles, making it a durable and flexible option for testing environments or applications where the card ID needs to be updated or cloned repeatedly.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What is a UID-changeable RFID keyfob and how does it work?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"A UID-changeable RFID keyfob operates at 13.56 MHz and contains a rewritable chip whose unique identifier (UID) can be overwritten using a compatible RFID card writer. 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Always verify your reader's chip compatibility before purchasing.\"}}, {\"@type\": \"Question\", \"name\": \"Can the UID be rewritten multiple times?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes — the chip is designed to support multiple rewrite cycles, making it a durable and flexible option for testing environments or applications where the card ID needs to be updated or cloned repeatedly.\"}}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"BreadcrumbList\", \"itemListElement\": [{\"@type\": \"ListItem\", \"position\": 1, \"name\": \"Home\", \"item\": \"https:\/\/vpggdm-rp.myshopify.com\/\"}, {\"@type\": \"ListItem\", \"position\": 2, \"name\": \"Tech, Tools \u0026 Auto\", \"item\": \"https:\/\/vpggdm-rp.myshopify.com\/collections\/tech-tools-auto\"}, {\"@type\": \"ListItem\", \"position\": 3, \"name\": \"13.56MHz Rewritable UID RFID IC Card Keyfob – 1KB Chip\", \"item\": \"https:\/\/vpggdm-rp.myshopify.com\/products\/13-56mhz-uid-rewritable-rfid-ic-card-keyfob-changeable-chip\"}]}\u003c\/script\u003e","brand":"Qme","offers":[{"title":"one size","offer_id":49790295900374,"sku":"14:175#one size","price":9.96,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0827\/5243\/8486\/files\/Sfdd0874c43304f66ab3b35486ea71ff28.webp?v=1785345555","url":"https:\/\/qmeboost.com\/products\/13-56mhz-uid-rewritable-rfid-ic-card-keyfob-changeable-chip","provider":"Qme","version":"1.0","type":"link"}