Compatible for Synology DiskStation models: DS1817+, DS1517+Compatible for Synology RackStation models: RS1219+, RS818+ / RS818RP+DDR3L 1600MHz PC3L-12800 204-Pin Unbuffered Non ECC 1.35V CL11 Dual Rank 2Rx8 based 512x8 Module Size: 8GB Package: 2x8GBEquivalent to an original Synology RAM1600DDR3L-8GBx2 module Designed for maximum compatibility and easy installation to expand your Synology NAS server's memory capacityGuaranteed Lifetime warranty from Purchase Date Free technical support See more product details