Motherboard Supported: Micro ATX, Mini ITXNumber of Fans Supported: 5Number of Fans Installed: 2Installed Fan Size: 4.72", 5.51"Number of External 5.25" Bays: 2Number of Internal 3.5" Bays: 2Number of Internal 2.5" Bays: 2Number of Total Expansion Bays: 6Number of Total Expansion Slots: 5Total Number of USB Ports: 2Total Number of Audio In Ports: 1Total Number of Audio Out Ports: 1Power Supply Installed: NoNumber of Power Supplies Supported: 1Number of Power Supplies Installed: 0Color: BlackMaterial: Aluminum, SteelHeight: 17.7"Width: 8.3"Depth: 17.3"Weight (Approximate): 15.79 lbPackage Contents: Obsidian Series 350D Windowed Micro ATX PC Case, Quick Start Guide, Limited Warranty: 2 YearThe Micro ATX case for high-performance system builds The Obsidian Series 350D Micro ATX PC case is designed for building compact high-performance systems with Micro ATX and Mini ITX motherboards. The compact size is ideal if space is limited, but there's plenty of room inside for liquid CPU cooling, dual hard drives, dual SSDs, and dual full-length graphics cards. Like all Obsidian cases, the 350D is designed for fast and neat builds, with tool-free access and drive installation. Smart features like a native 2.5" SSD cage make the most of its small size, and the cooling-focused interior has five fan mounting points, with room for two 240mm radiators.