FSP ZENFAN-B is a high-performance 120mm PWM PC case fan designed to deliver efficient airflow with smart monitoring features. It includes an integrated digital display for real-time RPM and temperature monitoring, a built-in thermal sensor, and an HDB bearing for smooth, quiet and reliable operation. With an 800–1600 RPM PWM speed range, 57.61 CFM airflow, 1.48 mmH₂O static pressure, and a low 26 dBA noise level, ZENFAN-B provides effective PC case cooling while maintaining a clean and modern appearance. Its extended 120 × 140 × 28mm design uses standard 120mm screw-hole mounting and is recommended for rear case installation.