ZJchao New RFID 13.56Mhz Mifare ISO14443A Reader/ Writer USB TAGS SDK & Program dht USB SDK eReader V4.2 Software 3 Tags Free Full SDK (demo program with source code , VB,VC,DELPHI) support Mifare ISO14443A (Mifare_1KS50S70) Operation frequency : 13.56Mhz Built-in transceiver antenna reading distance 0 to 10cm  OS : win XP,win2k,win vista, win7,win8(32-bit and 64 - bit),linux