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Mihappy Radio Frequency Identification (RFID) 13.56 MHz module Kit. With it , you can Read and Write Rectangle Tags and Round Tags. The RFID Reader Module can be used in a wide variety of hobbyist and commercial applications, including access control, automatic identification, robotics, navigation, inventory tracking, payment systems, and car immobilization. Features : Basic on the Philips MFRC522 Chip. Power Voltage : 3.3V. Current :13-26mA. Operating frequency: 13.56MHz. Read Range: 0 ~ 60mm (mifare1 card). Interface: SPI. Dimensions: 40mm × 60mm. Size of Round Tag : 0.87 × 85.5 × 54 mm. Size of Rectangle Tag : 32 x 40.5 x 4.2 mm. Package Content : 1 X RFID RC522 module. 1 X Round Tag. 1 X Rectangle Tag.