--- product_id: 412225925 title: "JASAG 100pcs Premium Rewritable UID Smart Card, Mi Fare 1K S50 RFID Cards Keys, 13.56MHz PVC Blank White JASAG-UID5050 JASAG-UID5050" brand: "to be second" price: "$87.34" currency: USD in_stock: true reviews_count: 8 category: "To Be Second" url: https://www.desertcart.us/products/412225925-jasag-100pcs-premium-rewritable-uid-smart-card-mi-fare-1k store_origin: US region: United States of America --- # Unique encrypted UID 13.56MHz frequency 100,000+ rewrites JASAG 100pcs Premium Rewritable UID Smart Card, Mi Fare 1K S50 RFID Cards Keys, 13.56MHz PVC Blank White JASAG-UID5050 JASAG-UID5050 **Brand:** to be second **Price:** $87.34 **Availability:** ✅ In Stock ## Summary > 🔐 Unlock limitless access with every swipe! ## Quick Answers - **What is this?** JASAG 100pcs Premium Rewritable UID Smart Card, Mi Fare 1K S50 RFID Cards Keys, 13.56MHz PVC Blank White JASAG-UID5050 JASAG-UID5050 by to be second - **How much does it cost?** $87.34 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/412225925-jasag-100pcs-premium-rewritable-uid-smart-card-mi-fare-1k) ## Best For - to be second enthusiasts ## Why This Product - Trusted to be second brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Secure & Unique:** Each card features a unique encrypted 4-byte UID for enhanced security and tracking. - • **Versatile Use Cases:** Ideal for office, apartment, park access, and even gaming NFC applications like Skylanders and Nintendo Switch. - • **Seamless Compatibility:** Works flawlessly with all 13.56MHz RFID readers and door access systems. - • **Compact & Durable Design:** Standard bank card size with waterproof PVC material built to withstand -40°C to 65°C. - • **Endless Reprogramming Power:** Supports over 100,000 read/write cycles for ultimate durability and flexibility. ## Overview The JASAG 100pcs Premium Rewritable UID Smart Cards are high-quality 13.56MHz RFID cards compatible with MI-Fare Classic 1K systems. Each card supports over 100,000 rewrites, features a unique encrypted UID, and fits standard card readers with a 0-10cm reading range. Designed for durability and versatility, these cards are perfect for secure access control in professional and residential environments, as well as innovative NFC gaming uses. ## Description Product Parameters 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 / -40℉~ 149℉ Read/write Times: 100000 times Size: Same size as bank card. 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: Skylanders - The cards work well for skylander figure substitudes. Review: Worked for Skylanders, tested with Nintendo Switch, Block 0 Writeable - Update: Yes! The UID IS REWRITABLE. This means sector 0, block 0 does change and CAN be reprogrammed. Phones are limited to this. It needs a card reader. Worked perfectly for Skylander's NFC. which I even tested successfully on my Nintendo Switch. I used with my android phone and mifare classic tool app to read and write to the tags. Very pleased. Yes, Imaginators creation crystals will work on these and it works with the NFC AC22 reader. Over 300 characters so I'll be purchasing again! ## Features - Support read, write and reprogram, over 100, 000 rewrite times. Can clone 13.56MHz IC card, can not copy 125KHz cards. - Fully compatible to MI-FARE Classic 1K,4-byte UID, 1024 bytes memory, organized in 16 sectors of 4 blocks, compliant to ISO/IEC 14443A protocal. - Suitable for 13.56MHz card reader and reading distance is 0-10cm (0-4inch). - Each card with a unique encrypted ID number, card data can be reprogrammed. - Working frequency is 13.56MHz. Compatible with all kinds of 13.56MHz RFID products and door access control system. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B09N9J4FJX | | Batteries required | No | | Best Sellers Rank | #590 in Home Security Systems | | Customer Reviews | 4.5 4.5 out of 5 stars (19) | | Included Components | Case | | Item Weight | 1.28 pounds | | Item model number | JASAG-UID5050 | | Manufacturer | TO BE SECOND | | Product Dimensions | 3.4 x 2.1 x 0.03 inches | | UPC | 192881949001 | ## Product Details - **Brand:** TO BE SECOND - **Color:** White - **Display Type:** Digital - **Material:** PVC - **Operating Temperature:** 65 Degrees Celsius ## Images ![JASAG 100pcs Premium Rewritable UID Smart Card, Mi Fare 1K S50 RFID Cards Keys, 13.56MHz PVC Blank White JASAG-UID5050 JASAG-UID5050 - Image 1](https://m.media-amazon.com/images/I/51lyX9+qmrL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Skylanders *by S***1 on December 21, 2025* The cards work well for skylander figure substitudes. ### ⭐⭐⭐⭐⭐ Worked for Skylanders, tested with Nintendo Switch, Block 0 Writeable *by C***Y on November 30, 2024* Update: Yes! The UID IS REWRITABLE. This means sector 0, block 0 does change and CAN be reprogrammed. Phones are limited to this. It needs a card reader. Worked perfectly for Skylander's NFC. which I even tested successfully on my Nintendo Switch. I used with my android phone and mifare classic tool app to read and write to the tags. Very pleased. Yes, Imaginators creation crystals will work on these and it works with the NFC AC22 reader. Over 300 characters so I'll be purchasing again! ### ⭐⭐⭐⭐⭐ Actually Rewritable!! *by N***S on January 14, 2026* These cards are actually Rewritable and the UID changes. A lot of other cards claim to be rewritable, but were not. With these, I was able to easily clone a UID and transfer it to another card!! ## Frequently Bought Together - TO BE SECOND JASAG 100pcs Premium Rewritable UID Smart Card, Mi Fare 1K S50 RFID Cards Keys, 13.56MHz PVC Blank White JASAG-UID5050 JASAG-UID5050 - ACS ACR122U NFC Reader Writer + 5 PCS Ntag213 NFC Tag + Free Software --- ## 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.us/products/412225925-jasag-100pcs-premium-rewritable-uid-smart-card-mi-fare-1k](https://www.desertcart.us/products/412225925-jasag-100pcs-premium-rewritable-uid-smart-card-mi-fare-1k) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-05-19*