--- product_id: 46907889 title: "UID Rewrite Changeable 13.56mhz Smart IC Key Tag Writable Zero 0 Sector 0 Block GEN1 Back up S50 1k Card for ACR122U-A9 Device Copier Clone 10pcs/lot by XCRFID" brand: "xcrfid" price: "€ 14.67" currency: EUR in_stock: true reviews_count: 8 category: "Xcrfid" url: https://www.desertcart.pt/products/46907889-uid-rewrite-changeable-13-56mhz-smart-ic-key-tag-writable store_origin: PT region: Portugal --- # 1K byte EEPROM memory 13.56MHz frequency 100,000 rewrites UID Rewrite Changeable 13.56mhz Smart IC Key Tag Writable Zero 0 Sector 0 Block GEN1 Back up S50 1k Card for ACR122U-A9 Device Copier Clone 10pcs/lot by XCRFID **Brand:** xcrfid **Price:** € 14.67 **Availability:** βœ… In Stock ## Summary > πŸ”‘ Clone, backup, and secure your access like a proβ€”never get locked out again! ## Quick Answers - **What is this?** UID Rewrite Changeable 13.56mhz Smart IC Key Tag Writable Zero 0 Sector 0 Block GEN1 Back up S50 1k Card for ACR122U-A9 Device Copier Clone 10pcs/lot by XCRFID by xcrfid - **How much does it cost?** € 14.67 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/46907889-uid-rewrite-changeable-13-56mhz-smart-ic-key-tag-writable) ## Best For - xcrfid enthusiasts ## Why This Product - Trusted xcrfid brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Bulk Ready:** Pack of 10 cards ideal for professional environments and emergency backups. - β€’ **High Durability:** Supports up to 100,000 rewrite cycles for long-term, reliable use. - β€’ **Robust Compatibility:** Works flawlessly with ACR122U-A9 and all ISO14443A door access systems. - β€’ **Seamless UID Rewrite:** Effortlessly clone and restore lost M1 card IDs with writable Sector 0 Block. - β€’ **Secure Memory Management:** 16 sectors with user-definable access conditions and passwords per block. ## Overview The XCRFID UID Rewrite Changeable Smart IC Key Tag operates at 13.56MHz with 1K byte EEPROM memory, featuring a writable Sector 0 Block for UID cloning. Compatible with ACR122U-A9 devices and ISO14443A protocols, it supports up to 100,000 rewrites, making it a durable, professional-grade solution for access control, identification, and emergency card replacement. Sold in packs of 10, it’s perfect for managers who demand seamless security and backup readiness. ## Description Please make sure you know how to use it before purchase !!! Feature This card works the same as normal M1 cards. Works exactly like the MFS501k, with 16 Sectors and 4 Blocks each Sector, but the Sector 0 Block Zero can be writableIt's advantage This is a perfect solution for a lost irreplaceable M1 Cards ID, you don't need to re-enroll new cards. Just program this new MF 1K's UID to the UID of lost card then you have a new Exactly the same card. User definable access conditions & password for each memory block Organized in 16 sector with 4 blocks of 16 bytes each (one block consists of 16 byte)Specifications Protocol: ISO14443A Capacity: 1k bytes EEPROM memory Rewrite Times: 100,000 timesRead Distance: 0 ~ 10 cm(depends on the R/W device) Material: PVCApplication LoyaltyTicketingIdentificationAccess ControlPackage Include 10pcs X UID Changeable IC Tag ## Features - UID Changeable Zero 0 block rewritable with 4 byte UID. You can through our UID Card Tools read out the dump file , Then back up . The UID Number will be changed - Please Noticed: It supports original ACR122U-A9 Read Write and Copy Cards. Please make sure you know how to use it before purchase !!! - Working frequency is 13.56MHz. Compatible with all kinds of door access control system - Rewrite Writable Smart IC Tag , 1K byte EEPROM Memory , Copy card. Fully compatible to MFClassic 1K,4 byte UID, organized in 16 sectors of 4 blocks, compliant to ISO/IEC 14443A protocal. - THIS ITEM IS NOT INTENDED FOR USERS UNDER 12 YEARS OLD ! ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0748DBKW2 | | Best Sellers Rank | #329 in Home Security Systems | | Brand | XCRFID | | Connection Type | USB | | Connectivity Technology | USB | | Customer Reviews | 4.1 out of 5 stars 85 Reviews | | Manufacturer | XCRFID | | Media Type | rfid | | Minimum System Requirements | Windows 7 | | Model Name | MF1K Key Tag | | Resolution | 10000 | | Scanner Type | RFID scanner | | Unit Count | 10.0 Count | ## Product Details - **Brand:** XCRFID - **Connectivity Technology:** USB - **Maximum Media Size:** 3.37 x 2.125 inches - **Minimum Required Operating System Version:** Windows 7 - **Minimum System Requirements:** Windows 7 - **Model Name:** MF1K Key Tag - **Resolution:** 10000 - **Scanner Type:** RFID scanner ## Images ![UID Rewrite Changeable 13.56mhz Smart IC Key Tag Writable Zero 0 Sector 0 Block GEN1 Back up S50 1k Card for ACR122U-A9 Device Copier Clone 10pcs/lot by XCRFID - Image 1](https://m.media-amazon.com/images/I/71djmNuKmuL.jpg) ![UID Rewrite Changeable 13.56mhz Smart IC Key Tag Writable Zero 0 Sector 0 Block GEN1 Back up S50 1k Card for ACR122U-A9 Device Copier Clone 10pcs/lot by XCRFID - Image 2](https://m.media-amazon.com/images/I/71FD33HvyAL.jpg) ![UID Rewrite Changeable 13.56mhz Smart IC Key Tag Writable Zero 0 Sector 0 Block GEN1 Back up S50 1k Card for ACR122U-A9 Device Copier Clone 10pcs/lot by XCRFID - Image 3](https://m.media-amazon.com/images/I/718ACpibDmL.jpg) ![UID Rewrite Changeable 13.56mhz Smart IC Key Tag Writable Zero 0 Sector 0 Block GEN1 Back up S50 1k Card for ACR122U-A9 Device Copier Clone 10pcs/lot by XCRFID - Image 4](https://m.media-amazon.com/images/I/71EAzr+UXJL.jpg) ![UID Rewrite Changeable 13.56mhz Smart IC Key Tag Writable Zero 0 Sector 0 Block GEN1 Back up S50 1k Card for ACR122U-A9 Device Copier Clone 10pcs/lot by XCRFID - Image 5](https://m.media-amazon.com/images/I/718TIW6vGVL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by T***O on August 13, 2024* ### ⭐⭐⭐⭐⭐ Review *by A***W on May 10, 2022* ### ⭐ Review *by J***S on October 30, 2025* ## Frequently Bought Together - UID Rewrite Changeable 13.56mhz Smart IC Key Tag Writable Zero 0 Sector 0 Block GEN1 Back up S50 1k Card for ACR122U-A9 Device Copier Clone 10pcs/lot by XCRFID - Writable Dual chip UID Changeable MF1 1K with 125_LF T5577 Rewritable ID/IC Card for Copy Clone Backup - OBO HANDS Pcs of 10 UID IC Card Changeable Smart Card Clone Card for 1K S50 MF1 RFID 13.56MHz Access Control Block 0 Sector Writable --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.pt/products/46907889-uid-rewrite-changeable-13-56mhz-smart-ic-key-tag-writable](https://www.desertcart.pt/products/46907889-uid-rewrite-changeable-13-56mhz-smart-ic-key-tag-writable) --- *Product available on Desertcart Portugal* *Store origin: PT* *Last updated: 2026-05-12*