Dual M.2 SSD adapter card for extraordinary cache performance Specification Hardware Specifications General Host Bus Interface PCIe 2.0 x8 Bracket Height Low Profile and Full Height Size (Height x Width x Depth) 70 mm x 180 mm x 18 mm Operating Temperature 0°C to 40°C (32°F to 104°F) Storage Temperature -20°C to 60°C (-5°F to 140°F) Relative Humidity 5% to 95% RH Warranty 3 Years Notes The warranty period starts from the purchase date as stated on your purchase receipt. Storage Storage Interface PCIe NVMe / SATA Supported Form Factor 2280 / 2260 / 2242 Connector Type and Quantity M-key, 2 Slots Compatibility Applied Models NVMe & SATA SSD FS series:FS1018 22 series:RS822RP+, RS822+ 21 series:RS1221RP+, RS1221+ 20 series:RS820RP+, RS820+ 19 series:DS2419+II, DS2419+, DS1819+ 18 series:RS2818RP+, RS2418RP+, RS2418+, DS3018xs, DS1618+ SATA SSD FS series:FS2017 19 series:RS1219+ 18 series:RS3618xs, RS818RP+, RS818+ 17 series:RS18017xs+, RS4017xs+, RS3617xs+, RS3617RPxs, DS3617xsII, DS3617xs, DS1817+, DS1517+ Notes DSM version requirement: 6.2-23739-2 onward (or 6.1-15284-2 onward with DSM 6.1) Operating system requirement for RS1221RP+, RS1221+, RS822RP+, and RS822+: DSM 7.2-64551 or later. RS1221RP+, RS1221+, RS822RP+, and RS822+ support M.2 NVMe SSD with the M2D18 add-in card.