SO-DIMM DDR4
From Amazon
MUSHKIN Essentials - DDR4 Laptop DRAM - 32GB (2 x 16GB) SODIMM Memory - 3200MHz (PC4-25600) CL-22-260-pin 1.2V Notebook RAM - Dual Channel - Low Voltage - (MES4S320NF16GX2)
Clove Technology
Mushkin Essentials memory module 32 GB 2 x 16 GB DDR4 3200 MHz