These RFID tags operate at 13.56MHz and are suitable for MOD-RFID1356 and MOD-RFID-1356-BOX. They come in different shape and have different reading distance, generally the bigger is the tag bigger reading distance it have. FEATURES • EM4233 64 bit Read only tag • Operating Temperature -40 °C ~ +85 °C • Relative Humidity 5% to 90% non-condensing • Operating frequency 13.56Mhz