Key features: Dc3.3v ~5v power supply, uart-ttl interface Compliant with iso14443a standard, Read/write or read only uid of mifare classic 1k /4k, mifare ultralight, mifare ultralight c etc Available with e-wallet increment, descrement, backup value, etc External antenna, reading range up to 5 ~ 7cm External led and buz available ( external driver circuit needed) Technical Parameters: Electrical Specification Power supply DC 3.3V ~ 5V Power consumption Max current
