Compatibility:the for Compute Module 5 IO PoE Board, facilitates easy access to all ports and connectors without compromising on functionality. Enhanced Functionality: The inclusion of a fan enhances airflow, significantly reducing the risk of overheating, which is crucial for maintaining the longevity and efficiency of your device. General: Built-in fan, PWM speed control Interface: 4-wire PWM speed control fan interface Rated speed: 8000+10%RPM Power supply: 5V Due to different batches, there may be differences in product appearance and printed text, which will not affect use Colour:Black Material:Aluminum + Copper Package Contents: 1 x Integrated fan Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.