Amazon
Exclusive "Shark Force" fan blade design for low noise and high performance Wide 0 to 2200 RPM RPM speed control via PWM The 3-phase, 6-pole design allows for smoother and quieter operation and significantly increased power efficiency than many single phase and 4-pole
Exclusive "Shark Force" fan blade design for low noise and high performance Wide 0 to 2200 RPM RPM speed control via PWM The 3-phase, 6-pole design allows for smoother and quieter operation and significantly increased power efficiency than many single phase and 4-pole