Synology DX1215ii, 12 bay Expansion Unit, HDD Interface 12 x SATA (12 x Bay), Drive 3.5" SATA HDD, 2.5" SATA HDD, 2.5" SATA SSD, Adapter 550W, AC Input Power Voltage 100V to 240V AC, Power Frequency 50/60 Hz, Single Phase, Power Consumption 51.23W (Access), 21.71W (HDD Hibernation). With its 12-bay desktop form factor, the DX1215II provides generous storage expansion for Synology DiskStation1 whenever needed with minimal impact on the deployment footprint. Add a new volume to your storage.