chip RF: NTAG213, NTAG216, M1 S50, ecc. frequenza RF: 13.56MHz Communication protocol: ISO 14443 typeA Sensing distance: 1~8 cm Material: ABS, PVC, Epoxy Dimensions: φ25mm, φ28mm, φ30mm, φ35mm, φ42mm, 35×35mm, 20× 30 mm, 22× 45 mm, 54×85.5mm, ecc., can be customized Shape: round, square, rectangular, ellipse, irregular shape, cartoon shape, ecc. can be customized Production process: four-color printing, serigrafia, surface printing number, LOGO, …