Hidden connectors: Compatible with motherboards with hidden connectors and optimizes clean cable management for space-saving construction. Suitable cooling: The A21 PLUS features four ARGB fans for excellent cooling, and the front panel mesh is 40% porous to maximize the balance between airflow, dust filtering, and RGB visibility. Comprehensive cable management: The A21 PLUS has a 33mm wide motherboard compartment to keep your cables neat and tidy