13.56MHz Writable Fob Tag, 100Pcs Rewritable 4-Byte UID Smart Keys Compatible with MIFARE Classic 1K RFID Keyfob Card Access Control Writable Card with Unique Encrypted ID Number

• Great Performance: The rewritable UID key fob supports reading, writing, and re-programming with over 100,000 rewrite cycles. It can clone 13.56MHz IC cards and NFC stickers but is not compatible with 125KHz key cards
• High Compatibility: Fully compatible with MIFARE Classic 1K, featuring a 4-byte UID, 1024 bytes of memory, 16 sectors with 4 blocks each, and compliance with the ISO/IEC 14443A standard
• Unique Encrypted ID Number: Each RFID card features a unique encrypted ID number, and card data can be re-programmed
• Wide Application: Compatible with various 13.56MHz RFID readers and access control system devices
• Premium Quality: Each fob is water-resistant and comes with a keychain

Features: If you want to add a key tag to your lock system, make sure your system uses the same frequency of unencrypted 13.56MHZ. Sophisticated design, stable performance, convenient in use. You will receive 100pcs writable UID key fobs, adequate quantity to meet your needs. Specification: Item Type: Rewritable UID Key Fobs Material: ABS Key Fob Size: 3.2 x 4 x 0.35 cm / 1.26 x 1.57 x 0.14 in Key Ring Diameter: 20mm / 0.79 in Color: Black Package Includes: 100 x Rewritable UID Key Fobs