Key features: 3.3v ~5v power supply, uart-ttl interface; Tiny size, single-face laying components with stamp-hole Compliant with iso14443a/b, iso15693, iso18092 standard Support iso7816 standard psam/cpu card; Read/write or read uid only working mode Support to create standard data file, back-up data file, value file, linear record file, cyclic record file and transaction mac file) Support key authenticate, get key version, change key, etc; Available to operate desfire picc level, application id create/delete/format, etc Support for standardized encryption algorithms (des, 3des, and aes, mac), etc External led and buz available (external driver circuit needed) Technical Parameters: Electrical Specification Power supply DC 3.3V ~ 5V Power consumption Max current�?