Synology M2D18 ,Dual M.2 SSD Adapter CardDual 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 0C to 40C (32F to 104F) Storage Temperature 20C to 60C ( 5F to 140F) Relative Humidity 5% to 95% RH Warranty 3 Years Notes The warranty period starts from the purchase date as stated on your