Smartcard Reader of Dell Latitude E7450 not recognized

The specifications for the ExpressCard slot only state = 5-in-1 Memory Card Reader 54mm Express Card Smart Card Reader PCMCIA card Cancel

The SIM card slot would only support mobile networking SIM cards The system also has a Smart Card Reader: Hence please help me understand which

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dell sc slot Dell J8D9G Poweredge R820 Front USBSD-Reader Kit MSRP: Was: Now: $ Add to Cart Dell RN354 Poweredge Internal SD