Form Factor 1U MB Form Factor Micro ATX Drive Bays Internal 3.5": 2 Internal 2.5": 2 Slim ODD: option PSU Form Factor Flex ATX Indicators 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 USB3.0 System Security N/A Cooling Fans 3x 40mm(T28mm, up to 48mm), PWM Expansion Slots 1 x Full Height HDD Backplane N/A Item Dimension (L"xW"xH") NA