Asus A21 Mid-Tower Case (White) - (AC-90DC00H3-B00000) Form Factor: Mid-Tower (supports ATX, Micro-ATX, Mini-ITX motherboards) Cooling: Pre-installed fans (number may vary), supports additional fan/radiator installation Drive Bays: 2.5″ and 3.5″ bays for storage expansion Expansion Slots: Standard ATX slots Front I/O Ports: USB-A, audio jacks Chassis Features: Tempered glass side panel, cable management, tool-free design PSU: Not included (supports standard ATX PSU) Color: White