JYJRFID 5 waterproof wristbands 13.56MHZ CLASSIC 1K RFID silicone waterproof wristband，NFC silicone bracelet,RFID adjustable wristband (blue)

JYJRFID 5 waterproof wristbands 13.56MHZ CLASSIC 1K RFID silicone waterproof wristband，NFC silicone bracelet,RFID adjustable wristband (blue)

• Product introduction: Built in MF Classic 1K chip, working frequency: 13.56MHz; 1K bytes of memory; Protocol standard ISO14443A，Working with RC522 and PN532
• Product material: High quality silicone waterproof bracelet
• Product size: Size can be freely adjusted
• Product precautions: Pre programmed with a unique ID (4-byte UID). 4-byte UID cannot be changed, factory default key: FF FF FF FF
• The product is applied to various types of access control, company team building, competitions, concerts, swimming pools, gyms, etc