6 x high airflow case fans included: the Zalman i4 comes with six high airflow 120mm fans pre-installed at the front, rear and top of the case for excellent cooling performance.
I/O panel: the Zalman i4 features a convenient top-mounted I/O panel with audio-in/out, USB 3.0 and USB 2.0 ports for easy connectivity.
Tool-less design: the Zalman i4 offers tool-less design for quick and easy component installation.