Synology RX2417sas Diskless System 12 Bay Expansion RX1217sas for FlashStation / RackStation (Diskless) HDD Interface: 24 x 2.5 SAS / SATA HDD / SSD (drives not included) Port Others: 1 x SAS IN 1 x SAS OUT Power: AC input power voltage: 100V to 240V AC Power frequency: 50 to 60Hz, single phase Temperature: Operating temperature: 5 degree C to 35 degree C (40 degree F - 95 degree F) Storage temperature: -20 degree C to 60 degree C (-5 degree F to 140 degree F) Humidity: 5-95% R.H Dimensions: 3.46 x 16.95 x 27.24 3.46 x 18.98 x 28.50 (with server ears) Weight: 36.60 lbs. Package Contents: 1 x RX2417sas main unit 1 x Quick Installation Guide 1 x Accessory pack 1 x Expansion cable (Mini-SAS HD) 2 x AC power cord