ETEKJOY 10 PCS Writable 125kHz RFID Key Fob Proximity ID Card Token Tag Rewritable T5577 Universal (Blank Card No Data)

Important Note: These are blank tags without pre-programmed card numbers. You cannot directly add them to RFID locks or use a card reader to read them. Before use, you must first write data(card numbers) into them by a 125KHZ RFID card writer. They are not IC cards or NFC cards. They don't work for TTLock or Tuya smart locks which use 13.56MHZ frequency. More product info and FAQ is listed in the Product Description. Please read the description before purchase.. Frequency: 125kHz; Sensing Distance: 2.5 to 10 cm (1 to 4 inch); Data Storage Life: 10 Years.. Writable & Rewritable. It can be erased and written 100,000 times. Suitable for making new and back-up tags, with the 125kHz RFID card writer/copier.. Chip: ATMEL T5577 (compatible with other universal 125kHz tags).. Approx Size: 1.4*1.1*0.2 inch. High-Quality Copper Coil inside. Casing Material: ABS Plastic. Waterproof & Durable. Package includes 10 PCS.