12BAY SAS 12G RAID EXPANSION HDD Interface: 12 x 3.5 SAS / SATA 12/6Gb/s, SAS / SATA 3Gb/s hard drive or 2.5 SAS / SATA SSD Form Factor: 2U LEDs: Front panel: Status, fault, system over heat, fan error Rear panel: SAS link, SAS error, enclosure ID Power: Power Consumption: In Operation 162.47W Power Supply: Redundant / Hot Swap ATX Power Supply, 400W, 90-264V AC~, 47-63Hz Temperature: 0°C - 40 °C Humidity: 5-95% R.H Dimensions: 3.46 x 17.28 x 20.47 Weight: 32.63 lbs.