Gammix D10 is ADATA's mid-range DDR4 desktop line, sold across single sticks and matched pairs at a couple of different speed grades under one family name — a heatspreader kit built for standard desktop cases without needing extra clearance.
2×8GB at 3200 MT/s CL16 gives 16GB in this listing; a same-capacity kit elsewhere in the family can carry a different rated speed, so check the number on the actual listing rather than assuming from the family name. As with any DDR4 kit, that rated speed needs the board's XMP profile enabled in firmware to be reached at all.
It's DDR4 UDIMM for standard desktop boards, built for consumer platforms rather than anything requiring registered or buffered memory.