... Great Looking strong plastic Round Strong Waterproof NFC NXP NTAG203 RFID Tag working with all nfc mobile phones 1.Waterproof, durable, and ... .Flexible usage, like for room key,ID cards, access control3.Keyfob measures 4cm by 3cm. Ring is 2cm diameter, and other ... housing is finished by Ultrasonic plastic welding, which makes the keyfob water and dust proof. To provide more value added product ...