Synology ,M2D20 M.2 Adapter Card for SSD CacheM. 2 SSD & 10GbE combo adapter card for performance acceleration Specification Hardware Specifications General Host Bus Interface PCIe 3. 0 x8 Bracket Height Low Profile and Full Height Size (Height x Width x Depth) 71. 75 mm x 181. 9 mm x 15. 8 mm Operating Temperature 0C to 40C (32F to 104F) Storage Temperature 20C to 60C ( 5F to 140F) Relative Humidity 5% to 95% RH Warranty 5 Years Notes The warranty period starts from the purchase date as stated