Support Mini ITX Motherboard: ITX Motherboard dimension 6.7*6.7in (17*17cm).

Support Flex or 1U Power Supply Unit: Flex PSU dimension 3.21*1.59*5.91in (81.5*40.5*150mm). 1U PSU dimension 3.94*1.59in (100*40.5mm) maximum length 7.48in (190mm).

Support 1 Single Slot Full Height PCI-e Expansion Card: To add video card or network card or more.

Come With 2 Front USB 3.0: USB 3.0 for faster data transfer.

Come With 1 8cm Replaceable Fan: Pre-installed 80*80*25mm chassis fan.