A-Tech RAM memory compatible replacement for Synology RAM1600DDR3-4G ^^ Compatible for Synology NAS DiskStation & RackStation models: DS1515+, DS1517+, DS1815+, DS1817, DS1817+, DS2015xs, DS216+, DS216+II, DS2415+, RS1219+, RS2416+, RS2416RP+, RS815+, RS815RP+, RS818+, RS818RP+ ^^ Single 4 GB Module; DDR3/DDR3L SO-DIMM 204-Pin; Speeds up to 1600 MHz, PC3L-12800/PC3L-12800S (PC3-12800/PC3-12800S) ^^ NON-ECC Unbuffered; 1Rx8 (Single Rank x8); JEDEC DDR3L standard 1.35V (Dual voltage, can operate at 1.35V or 1.5V ) ^^ An A-Tech memory upgrade expands your system's available memory resource, improving performance, boosting speeds, and allowing you to take on more while maintaining a smooth experience ^^ All A-Tech memory modules undergo stringent quality control testing to ensure dependable and reliable performance ^^ Backed by A-Tech's Limited Lifetime Warranty and supported by our knowledgeable Tech Team available to help before and after your purchase