For what is this slot ? : rcomputers

HP EliteBook Folio 9470m Review hp elitebook sc slot How to Use Sim card in HP Laptop Elitebook 850 G6 hp elitebook sc slot How to Use the Built-In Card Reader on an HP Laptop Part of the series: Computer Help

hpe 500w flex slot platinum hot plug low halogen power supply kit So I'm shopping around and I land at a HP laptop An HP Elitebook 1040 G3 The seller on ebay doesn't even mention anything about the SC slot