4U 17.5' Compact Industrial Server Chassis With entire isolated anti-vibration cage, dust-proof filter, and compact size make it perfect for space-sensitive industrial applications. Features & Benefits -Supports M/B up to 12' x 9.6' -Available for rackmount and stand-alone installation -Dedicated 80 mm fan for HDD cooling -Truly isolated anti-vibration design on internal HDD and drive cages -Card retainer to hold low profile and full height add-on cards -Front 120mm fan with filter for add-on card cooling Specification MB Form Factor ATX (12' x 9.6') Dimension (D x W x H) 465.2 x 430.0 x 176.0 (mm) Drive Bay External 3.5'：1 External 5.25'：3 Internal 3.5'：4 Slim ODD：1 PSU Form Factor PS/2 single Indicator 1 x Power Status 2 x LAN Activity 1 x HDD Status Front Control 1 x Power On/Off 1 x System Reset 2 x USB2.0/USB3.0 (Option) Cooling Fan Front: 1 x 120 mm (T=25 mm), PWM, Rear: 2 x 80 mm (T=25 mm) (Option) System Security Intrusion Switch (Option) Key Lock on Front Door Expansion Slot Opening 7 x Full Height Net Weight 9.5 kg/20.93 lb Gross Weight 12.3 kg/27.09 lb