HERNAS 20pcs Rewritable UID Smart Key Fobs, Premium 13.56MHz ABS Blank Keys for Door Access Control, Mi-Fare 1K S50 Copy Card NFC Tags Duplicate Keys, Block 0 Sector, Comply ISO 14443A

Product Parameters Chip: UID changeable Material: High quality ABS plastic Operation frequency: 13.56MHz Support: Reading and writing, rewritable 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: 31 x 40 x 3 mm / 1.6 x 1.2 x 0.12 inch Package Including: 20 pcs blue UID keys Widely Used At: It applies to access control, hotel locks, elevator staff attendance and school campus access and payment control identification and security systems parking lot entry and payment, social security management transportation payment, municipal and ancillary service payment

• 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.
• Compatible with all kinds of 13.56MHz RFID readers writers and 13.56MHz door access control system devices.
• Support read, write and reprogrammed, over 100000 rewrite times. Can clone 13.56MHz IC card, NFC stickers, NOT compatible with 125KHz keys cards.
• Each key fob with a unique encrypted ID number, card data can be reprogrammed.
• High quality ABS plastic material, water resistant. Each fob comes with Key ring included.