Synology (RAM1600DDR3L-4GBx2) 8GB DDR3L SODIMM RAM Module Kit. Includes two (2) 4GB DDR3L SODIMM RAM modules.
Compatible with:
DS1817+
DS1517+
RS1219+
RS818+
RS818RP+
Please note: When installing more than one DIMM, it is recommended to get the same type of memory (same size, same speed, same manufacturer) for each slot.