Form Factor 4U M/B Form Factor Extended ATX (12" x13" ) Drive Bays External 3.5": 1 External 5.25": 1 Slim ODD: 1 Internal 3.5": 1 PSU Form Factor PS/2 Single or Mini-redundant Indicators 1 x Power Status 1 x HDD Activity 2x LAN Activity Front Buttons Power On/Off, Alarm Mute, System Reset, 2 x USB2.0 System Security Intrusion Switch Key Lock on Front Door Cooling Fans Front: 1 x 120mm(T: 25mm), PWM Rear : 2 x 80mm (Option) Expansion Slots 7,8 (RM41300G) or 15 x Full Height and Full Length HDD Backplane N/A Metal Thickness 1.2mm Front Bezel Option Weight 40 lb Warranty Information 1 year