Detailed features: 19" 4U 20-slot rack mount enclosure for backplne and CPU cards with ATX-1125BTA-R300 300W ATX power supply (without backplane)
Construction: Heavy-duty steel Drive Bay: Five drive bays; three 5.25" HDD and one 3.5" open, and one 3.5 hidden Backplane: 20-slot ISA, PICMG single/dual/quad segment systems LED Indicators: LED indicators for HDD and power on/off Switches: Reset and power on/off Keyboard Connector: AT type KBD connectors on both front and rear panel Color: Light gray Hold-down Clamp: Adjustable card retainder Air-Filter: One removable front-panel filter Cooling: Total four cooling fans, three behind the fan filter panel and one within power supply Power Supply: ACE-935A PS/2 300W AT power supply or ATX-1125BTA-R300 300W ATX power supply Dimension in mm: 177(H) X 482(W) X 638.0(D) (7" X 19" X 25.1") Weight: 18KG (Net) Operating Temperature: 0 to 55 C (32 to 131 F) Storage Temperature: 0 to 70 C Relative Humidity: 5 to 95%, non-condensing Vibration: 5 to 15Hz, 0.25G peak to peak 15 to 500Hz, 2.5G peak to peak