Each chip has a unique UID number, but the UID cannot be changed or rewritten，Default button: FF FF FF FF FF FF. 【About Application】-These RFID cards work with KABA,SAFLOK,MIWA AND ONITY LOCKS,also compatible with RC522 and PN532 readers.

Biodegradable nature of the product is kinder to the planet, teaching children the importance of sustainability. Not only does it provide excellent quality prints, but its biodegradable nature promotes an eco-friendly mindset.