Spacious Chassis: 4U server case with 7 internal 3.5' HDD bays and 2 extra 5.25' device slots. Expandable & Compatible: 7 PCI slots, supports ATX/CEB motherboards for future upgrades. Quiet Cooling: 3 pre-installed PWM fans (1x120mm front, 2x80mm rear) for efficient, quiet cooling. LED Indicators: Front panel LEDs for power and HDD status for quick monitoring. Enhanced Utility: 2 USB 3.0 ports and a front panel lock for added security.