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