Features: Supports M/B size up to 12' x 13' Diversified 12Gb/s HDD backplanes for flexible system configurations Case Type: 2U Material: 1.2mm SGCC M/B Type: E-ATX (12.0 x 13.0 inch), ATX (12.0 x 9.6 inch) Processor: N/A Drive Bays: 12 External: 12x 3.5' Hot-Swap Expansion Slots: 7x Low-profile Slots Backplane: 12Gb/s Mini-SAS HD with expander, SGPIO, I2C Rear Window: N/A Cooling System: Middle: 3x 8038 PWM Fans Front Panel: Front Control: Power On/Off, System Reset, UID Indicator: 1x Power Status, 2x LAN Activity, 1 x UID, 1x HDD Status, 1x System status Ports: 2x USB 3.0 Ports Power Supply: 800W CRPS 1+1 Redundant CRPS Power Supply Dimensions (WxDxH): 17.2 x 26.0 x 3.5 inch / 438.0 x 660.0 x 87.0 mm Weight: 11.5 kg Chassis only not including MB, HD and other parts. Photos are for representation only