The Amphenol BERGSTIK II 79425-102HLF is a dual-row unshrouded header, 2 positions per row (4 circuits total), on a 0.100" (2.54mm) pitch. It's a through-hole solder termination, male pin, square contact style header for board-to-board stacking. The 30.0µin (0.76µm) gold plating on the mating surface handles repeated mating cycles without corrosion, while the UL94 V-0 black nylon housing keeps it safe inside any enclosure that requires a flame rating.
The push-pull fastening keeps it simple: no locking latch, just a straight in-and-out mate. The 0.120" (3.05mm) solder post length is sized for standard 0.062" PCBs; the 0.190" (4.83mm) mating pin length gives enough wipe for reliable contact.