Chip:T5577 (compatible with other universal 125kHz tags),Frequency: 125kHz
Note: You canNOT add them to RFID locks directly. They are blank RFID tags, no data inside. You need to use a 125kHz RFID card writer to write card number into them to use. Round-coin-shape sticker, with adhesive back. You can stick it on other stuff (but not metal) if necessary.
Writable & Rewritable. It can be erased and written 100,000 times. Suitable for making new and back-up tags.
Size: 25mm Diameter, 1mm Thickness. Casing Material: White PVC Plastic. Waterproof & Durable. Package includes 10 PCS.
Description
125kHz T5577 RFID coin tag with adhesive backing for identity key tags that can be rewritten with a diameter of 25mm (10PCS)