The SAME SKY CFM-4028BG-1100-418-22 is a compact and efficient DC axial fan designed for a wide range of cooling needs. With dimensions of 40x40x28mm, this fan is suitable for applications where space is limited. It operates on a 12VDC power supply and utilizes a ball bearing system, providing enhanced durability and a longer operational life compared to sleeve bearing fans. The inclusion of a tachometer output allows for precise monitoring of the fan's rotational speed, enabling closed-loop control and performance optimization. This feature is particularly useful in applications where maintaining a specific airflow is critical. Supreme Components International, as an authorized distributor of SAME SKY, guarantees the authenticity and quality of this product. This fan is commonly used in electronics cooling, server racks, and other applications requiring reliable and efficient heat dissipation.