--- product_id: 344468667 title: "CIFY 20pcs Changeable UID Smart Card, Rewritable 13.56MHz RFID IC Blank Card for 1K S50 MF1 Mi-fare Door Access Control Block 0 Sector" brand: "cify" price: "SAR 87" currency: SAR in_stock: true reviews_count: 7 category: "Cify" url: https://www.desertcart.com.sa/products/344468667-cify-20pcs-changeable-uid-smart-card-rewritable-13-56mhz-rfid store_origin: SA region: Saudi Arabia --- # 13.56MHz frequency 100,000+ rewrites Unique changeable encrypted UID CIFY 20pcs Changeable UID Smart Card, Rewritable 13.56MHz RFID IC Blank Card for 1K S50 MF1 Mi-fare Door Access Control Block 0 Sector **Brand:** cify **Price:** SAR 87 **Availability:** ✅ In Stock ## Summary > 🔑 Unlock the future of smart access with endless possibilities! ## Quick Answers - **What is this?** CIFY 20pcs Changeable UID Smart Card, Rewritable 13.56MHz RFID IC Blank Card for 1K S50 MF1 Mi-fare Door Access Control Block 0 Sector by cify - **How much does it cost?** SAR 87 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.com.sa](https://www.desertcart.com.sa/products/344468667-cify-20pcs-changeable-uid-smart-card-rewritable-13-56mhz-rfid) ## Best For - cify enthusiasts ## Why This Product - Trusted cify brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Customizable Security:** Each card features a unique, encrypted UID that you can change to stay ahead of threats. - • **Seamless Compatibility:** Works flawlessly with all 13.56MHz door access control systems for effortless integration. - • **Optimal Proximity Range:** Designed for 0-10cm reading distance, ensuring quick, contactless entry every time. - • **Durable & Weather-Resistant:** Built to withstand temperatures from -40°C to 65°C, perfect for any environment. - • **Endless Rewrites, Limitless Access:** Over 100,000 reliable read/write cycles keep your security fresh and flexible. ## Overview The CIFY 20pcs Changeable UID Smart Cards are rewritable RFID cards operating at 13.56MHz, compatible with all major door access systems. Each card supports over 100,000 read/write cycles and features a unique, changeable encrypted UID for enhanced security. With a reading range of up to 10cm and durable construction suitable for extreme temperatures, these cards offer flexible, reliable, and secure access control solutions for offices, apartments, and more. ## Description Product Feature Chip: UID Material: PVC Frequency: 13.56MHz Material: High quality ABS Operation frequency: 13.56MHz Read and rewrite key tags Compatible with all Door Entry system Reading distance: 0-10cm (Depending on the reader's design,environment and application) Working temperature: -40 °C~ 65 °C Store temperature: -25 °C ~50 °C Read/write Times: 100000 times Product Description 1. High quality RFID cards proximity door control access. 2. Each card without a unique ID number 3. Suitable for 13.56MHz card reader and reading distance is 0-10cm. 4. Widely used at apartment, office, park and other places. 5. 100% brand new and high quality. 6. Read, Writable and Rewrite. Waterproof 7. Can copy write mi-fare 1k key card Review: Poor Quality for Printing on - Product is cheaply made, rfid warps the plastic coating on the outside and 12 out of 20 were scratched already Not good for full cover id card printing, chip worked fine on 18 of them, one locked blank 😳 the other just doesn't work at all! Review: Not 2nd Gen with writable UID - This was sold as writable UID and is not. Mifare tool tells me it is not a 2nd Gen tag after it fails to change Block 0 ## Features - ★Support read, write and copy, over 100, 000 rewrite times. - ★Working frequency is 13.56MHz. Compatible with all kinds of door access control system. - ★Each card with a unique encrypted ID number, can be changed. - ★Suitable for 13.56MHz card reader and reading distance is 0-10cm (0-4inch). - ★Fully compatible to MI-FARE Classic 1K,4-byte UID, 1K Byte memory, organized in 16 sectors of 4 blocks, compliant to ISO/IEC 14443A protocal. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B097BNYRP4 | | Batteries Required? | No | | Batteries included? | No | | Best Sellers Rank | 48,909 in Business, Industry & Science ( See Top 100 in Business, Industry & Science ) 101 in Medical RFID Supplies | | Colour | White | | Customer Reviews | 3.5 3.5 out of 5 stars (25) | | Date First Available | 30 April 2021 | | Guaranteed software updates until | unknown | | Item Package Quantity | 1 | | Item Weight | 130 g | | Manufacturer | CIFY | | Manufacturer reference | CIFY-20 UID | | Part Number | CIFY-20 UID | | Product Dimensions | 8.5 x 5.4 x 0.1 cm; 130 g | ## Images ![CIFY 20pcs Changeable UID Smart Card, Rewritable 13.56MHz RFID IC Blank Card for 1K S50 MF1 Mi-fare Door Access Control Block 0 Sector - Image 1](https://m.media-amazon.com/images/I/51xXeN0EWKL.jpg) ![CIFY 20pcs Changeable UID Smart Card, Rewritable 13.56MHz RFID IC Blank Card for 1K S50 MF1 Mi-fare Door Access Control Block 0 Sector - Image 2](https://m.media-amazon.com/images/I/51ADB6BIZeL.jpg) ![CIFY 20pcs Changeable UID Smart Card, Rewritable 13.56MHz RFID IC Blank Card for 1K S50 MF1 Mi-fare Door Access Control Block 0 Sector - Image 3](https://m.media-amazon.com/images/I/41B+Yb9l6SL.jpg) ![CIFY 20pcs Changeable UID Smart Card, Rewritable 13.56MHz RFID IC Blank Card for 1K S50 MF1 Mi-fare Door Access Control Block 0 Sector - Image 4](https://m.media-amazon.com/images/I/31a9Yup7M0L.jpg) ![CIFY 20pcs Changeable UID Smart Card, Rewritable 13.56MHz RFID IC Blank Card for 1K S50 MF1 Mi-fare Door Access Control Block 0 Sector - Image 5](https://m.media-amazon.com/images/I/61RRfGqBPFL.jpg) ## Questions & Answers **Q: Would these cards work with Net2?** A: This card is writable 13.56MHz UID cards, used to copy 13.56MHz Mi-fare IC card. **Q: Are these cards 1st or 2nd gen tags?** A: This is 13.56MHz writable UID cards, can copy mi-fare 1k card. ## Customer Reviews ### ⭐⭐⭐ Poor Quality for Printing on *by P***G on 31 May 2024* Product is cheaply made, rfid warps the plastic coating on the outside and 12 out of 20 were scratched already Not good for full cover id card printing, chip worked fine on 18 of them, one locked blank 😳 the other just doesn't work at all! ### ⭐ Not 2nd Gen with writable UID *by R***N on 19 June 2024* This was sold as writable UID and is not. Mifare tool tells me it is not a 2nd Gen tag after it fails to change Block 0 ### ⭐ UID not writable *by D***M on 15 December 2024* Despite the claims in the listing, block 0 UID is not writable. You can only write 63/64 blocks ## Frequently Bought Together - CIFY 20pcs Changeable UID Smart Card, Rewritable 13.56MHz RFID IC Blank Card for 1K S50 MF1 Mi-fare Door Access Control Block 0 Sector - Jadeshay RFID Reader,NFC Reader/Writer ACR122U ISO 14443A/B RFID Card Reader + Free Software in White,Contactless Smart Card Reader Writer with USB Cable --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.com.sa/products/344468667-cify-20pcs-changeable-uid-smart-card-rewritable-13-56mhz-rfid](https://www.desertcart.com.sa/products/344468667-cify-20pcs-changeable-uid-smart-card-rewritable-13-56mhz-rfid) --- *Product available on Desertcart Saudi Arabia* *Store origin: SA* *Last updated: 2026-09-11*