Mifare Card Reader/ Issuer : 1.Working frequency: 13.56MHz (support Mifare card) 2.RS232 interface Mifare Card Reader/ IssuerParameterSize: L110mm X W81mm X H25mmNet weight: 150g; Color: blackWorking frequency: 13.56MHz (support Mifare card)Effective distance: 40~120mm (depending on card quality)Power supply: get power from USB port directCommunication interface: RS232 interfaceState Display: ...