20 pieces RFID 125KHZ Key Fob Tag Card Rewritable T5577 Universal

Writable & Rewritable：They are empty RFID tags without data. They can repeatable reading and writing 100000 times. You need to write data to them for use. Compatible with RFID duplicators of 125kHz frequency, Features: Waterproof, dustproof, durable, Frequency /Chip: Frequency 125kHz, chip t5577, sensing distance 1-4 inches, Size /Package: Single size 1.4 * 1.1 * 0.2inch, Material: The inner coil is made of high-quality pure copper, the shell material is ABS plastic, waterproof and durable, suitable for making new tags and spare tags