Waterproof ABS 13.56MHz Printable NTAG213® Access Control NFC Keyfob is nfc technology products and made of ABS material with nfc chip and antenna . It will be durable and injection ABS case then sealing nfc inside with ultrasonic machine without any space sideview so that you can use them in out-door harsh environment and waterproof.NXP NTAG® series chips are realy compliant with NFC applications and type 2 in NFC forum , 13.56MHz and ISO 14443A protocol make them widely use in door access control , hotel keyfob ,memership management ,cashless payment ,healthcare and social networking ,etc , they can silk screen solid color for customer logo , laser engraving UID or serial numbers ,etc .Many ABS case colors and size ,shape are optional .