Form Factor: Rack-mountable - 4U Max Mainboard Size: ATX Supported Motherboards: ATX Max Supported Dimensions: 12.01 in x 9.61 in Internal Bays Qty: 4 Front Accessible Bays Qty: 4 Color: Black front bezel Cooling System: Front: 120 x 120 x 25 mm fan x 1 / Pulse-width modulation (PWM) support ¦ Rear: 80 x 80 x 25 mm fan mount x 2 System Cabinet Features: Vibration-absorbing drive cage, chassis intrusion detection, front dust filter, lockable front door, 2 x PSU bracket, HDD status indicator, LAN activity indicator, power status indicator