what is the slot labled SC above the HD on my Latitude E6420

HP HP Express Card Smart Card Reader AJ451AA B&H Photo Video hp elitebook sc slot Buy PC SD card slot card reader SC card board for HP 840 G1 G2 805608-001 at Aliexpress for Find more , and products Enjoy ✓Free Shipping Worldwide! hpe 5945 2slot switch SC card slot, Sim card slot SIZE : x x in ; x 8

hp elitebook sc slot Storage-wise, there is only one PCIe x4 slot And in terms of battery, HP has equipped the notebook with a 56Wh unit