1.NDEF format 2.ISO/IEC 14443A 3.Operating frequency: 13.56 MHz 4.168byte total memory, 144 bytes of user memory 5.Operating distance: Up to 100mm depending on field strength and antenna geometry) Craft: CMYK off set printing, Pantone color, Uinque QR, serial number,encoding an URL or numbers or text into the chip. Normal Ring: black rope, Round ring, Lobster metal ring or customzied
