Dell Latitude 5420 Rugged Setup and Specifications

System board connectors

Table 1. Internal M.2 System board connectors M.2 System board connectors
Sockets	Options
M.2 (Socket 1, Key A)	Wireless Local Area Network (WLAN) / Wireless Gigabit Alliance (WiGig)
M.2 (Socket 3, Key M)	SATA / PCIe x2 or PCIe x4 SSD
M.2 (Socket 2, Key B)	SSD / Wireless Wide Area Network (WWAN)