{"product_id":"100pcs-125khz-rfid-key-fob-tags-em4100-access-control-keychains","title":"100pcs 125KHz RFID Key Fob Tags EM4100 Access Control Keychains","description":"\u003ch2\u003e100-Pack 125KHz RFID Key Fob Tags — Reliable Access Control \u0026amp; Time Attendance\u003c\/h2\u003e\n\u003cp\u003eKeep your access control or time attendance system running smoothly with this bulk pack of \u003cstrong\u003e100 x 125KHz RFID key fob tags\u003c\/strong\u003e. Compatible with all standard EM4100\/TK4100 readers, these durable keyfobs are ready to use straight out of the box — no programming required. Available in 4 vibrant colours, they make it easy to colour-code staff, departments, or access zones.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChip:\u003c\/strong\u003e TK4100 \/ EM4100 — industry-standard read-only RFID chip\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFrequency:\u003c\/strong\u003e 125KHz — universally compatible with most access control readers\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWorking Type:\u003c\/strong\u003e Read-only — secure, tamper-resistant unique ID\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReading Distance:\u003c\/strong\u003e 1–5 cm for reliable short-range scanning\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReading Speed:\u003c\/strong\u003e 1–2 ms — near-instant response every time\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOperating Temperature:\u003c\/strong\u003e -20°C to 85°C — performs in demanding environments\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEndurance:\u003c\/strong\u003e \u0026gt;100,000 read cycles — built to last for years of daily use\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eConstruction:\u003c\/strong\u003e Anti-corrosion, high-temperature resistant shell; RF chip sealed with epoxy resin and ultrasonically welded for a robust, waterproof build\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCE Certified\u003c\/strong\u003e for quality and safety compliance\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e4 Colours\u003c\/strong\u003e included — perfect for colour-coded access level management\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat's in the Box\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e100 × 125KHz EM4100\/TK4100 Read-Only RFID Key Fob Tags (assorted colours)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIdeal Use Cases\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eOffice \u0026amp; building access control systems\u003c\/li\u003e\n  \u003cli\u003eEmployee time and attendance tracking\u003c\/li\u003e\n  \u003cli\u003eSchool, gym, or facility entry management\u003c\/li\u003e\n  \u003cli\u003eParking lot and gate access\u003c\/li\u003e\n  \u003cli\u003eReplacement or expansion of existing 125KHz RFID systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eMade in Mainland China.\u003c\/p\u003e\n\n\u003cp\u003eFor guidance on best practices for physical access control security, visit the \u003ca href=\"https:\/\/www.nist.gov\/topics\/cybersecurity\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eNIST Cybersecurity resource page\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: Are these 125KHz RFID key fobs compatible with my existing access control reader?\u003c\/h4\u003e\n\u003cp\u003eA: Yes — these keyfobs use the EM4100\/TK4100 chip operating at 125KHz, the most widely adopted standard for proximity access control readers. They are compatible with the vast majority of 125KHz EM readers available on the market. Always verify your reader supports 125KHz EM4100 format before purchasing.\u003c\/p\u003e\n\u003ch4\u003eQ: Can I write or reprogram these RFID key fob tags?\u003c\/h4\u003e\n\u003cp\u003eA: No. These are \u003cstrong\u003eread-only\u003c\/strong\u003e tags, meaning each fob has a permanently encoded unique ID that cannot be overwritten. This makes them highly secure and tamper-resistant. If you need writable tags, look for T5577 or EM4305-based 125KHz fobs instead.\u003c\/p\u003e\n\u003ch4\u003eQ: How durable are these keyfobs for everyday use?\u003c\/h4\u003e\n\u003cp\u003eA: Each keyfob is rated for over 100,000 read cycles and operates reliably from -20°C to 85°C. The RF chip is sealed inside an anti-corrosion, high-temperature resistant casing with epoxy resin filling and an ultrasonic weld, making it suitable for heavy daily use in both indoor and outdoor environments.\u003c\/p\u003e\n\u003ch4\u003eQ: How many colours are included in the 100-piece pack?\u003c\/h4\u003e\n\u003cp\u003eA: The pack includes fobs in 4 different colours, allowing you to colour-code different access levels, departments, or user groups for easy visual management.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"Are these 125KHz RFID key fobs compatible with my existing access control reader?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes — these keyfobs use the EM4100\/TK4100 chip operating at 125KHz, the most widely adopted standard for proximity access control readers. 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The RF chip is sealed inside an anti-corrosion, high-temperature resistant casing with epoxy resin filling and an ultrasonic weld, making it suitable for heavy daily use in both indoor and outdoor environments.\"}}, {\"@type\": \"Question\", \"name\": \"How many colours are included in the 100-piece pack?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The pack includes fobs in 4 different colours, allowing you to colour-code different access levels, departments, or user groups for easy visual management.\"}}]}\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:\/\/kujrmc-0q.myshopify.com\/\"}, {\"@type\": \"ListItem\", \"position\": 2, \"name\": \"Electronics \u0026 Tech\", \"item\": \"https:\/\/kujrmc-0q.myshopify.com\/collections\/electronics-tech\"}, {\"@type\": \"ListItem\", \"position\": 3, \"name\": \"100pcs 125KHz RFID Key Fob Tags EM4100 Access Control Keychains\", \"item\": \"https:\/\/kujrmc-0q.myshopify.com\/products\/100pcs-125khz-rfid-key-fob-tags-em4100-access-control-keychains\"}]}\u003c\/script\u003e","brand":"Vue","offers":[{"title":"NO.8 100pcs Grey","offer_id":48746091839680,"sku":"14:1889#NO.8 100pcs Grey","price":61.99,"currency_code":"USD","in_stock":true},{"title":"NO.8 100pcs Red","offer_id":48746091872448,"sku":"14:504#NO.8 100pcs Red","price":61.99,"currency_code":"USD","in_stock":true},{"title":"NO.8 100pcs Blue","offer_id":48746091905216,"sku":"14:1202#NO.8 100pcs Blue","price":61.99,"currency_code":"USD","in_stock":true},{"title":"NO.8 100pcs Yellow","offer_id":48746091937984,"sku":"14:1254#NO.8 100pcs Yellow","price":61.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0772\/9338\/7968\/files\/S9603bf40d11c459a948f1ee2ea0dfcb57.webp?v=1786190042","url":"https:\/\/vueselect.com\/products\/100pcs-125khz-rfid-key-fob-tags-em4100-access-control-keychains","provider":"Vue","version":"1.0","type":"link"}