The SAME SKY CFM-4028BG-1100-418-20 is a compact and powerful DC fan designed for a variety of cooling applications. With dimensions of 40x40x28mm, this fan is ideal for space-constrained environments. 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 integrated PWM control allows for precise adjustment of the fan speed, optimizing cooling performance and minimizing noise. A tachometer output provides a signal for monitoring the fan's rotational speed, enabling system administrators to track performance and detect potential issues. Supreme Components International is an authorized distributor of SAME SKY components, guaranteeing authenticity and quality.