This is a DC fan made by Sunon, and it measures 40x20mm. It runs on 12VDC with 10.8CFM (Cubic Feet of Air per Minute) of airflow and a noise output of 27.5dBA (Decibels A-weighted). The motor is rated for 8000RPM (Revolutions per Minute) and 0.29inch H2O (inches of Water) of static pressure. It is equipped with a Vapo Bearing and a MagLev Motor for enhanced accuracy and stability. The part number of this fan is MF40201VX-1000U-A99.