Part Number: CM4-IO-POE-BOX-A PoE Mini-computer for Raspberry Pi Compute Module 4 (NOT included), metal case, with cooling fan CM4 PoE IO Board inside, 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