Synology 4GB Memory Module D4NESO-2666-4G

Synology DDR4-2666MHz, 4 GB, Non-ECC SODIMM, 288pin, 1.2V

Compatible with: RS820RP+, RS820+, DS2419+, DS1819+, DS1618+, DS920+, DS720+, DS420+, DS220+, DVA3219