RF sglodion: NTAG213, NTAG216, M1 S50, ac ati. amlder RF: 13.56MHz Communication protocol: ISO 14443 typeA Sensing distance: 1~8 cm Material: ABS, PVC, Epoxy Dimensions: φ25mm, φ28mm, φ30mm, φ35mm, φ42mm, 3535mm ×, 20× 30mm, 22× 45mm, 54×85.5mm, etc., can be customized Shape: round, sgwar, rectangular, ellipse, irregular shape, cartoon shape, ac ati. can be customized Production process: four-color printing, silk screen, surface printing number, LOGO, …