Overview Metal Box (A) designed for Raspberry Pi Compute Module 4 IO Board, comes with cooling fan Designed for Raspberry Pi Compute Module 4 IO Board Mini computer chassis, robust and dust-proof, nice looking Make it easy to build your own Raspberry Pi CM4 mini PC Precise cut-out with clear label, each cut-out is completely aligned with the connector Comes with cooling fan, combined with the airflow vent, better heat dissipation Binocular Vision, PoE Powered Raspberry Pi Projects, Or Other Industrial Context Package Contains Metal case (top and bottom) x1 Screwdriver x1 Fan-4010-PWM-12V x1 Screws pack x1 For more details you may need to know, pls firstly send me message via , I will then send attached document including User Guide for you, thank you for patience.;D