42-Inch Tower Fan, Quiet Bladeless Cooling Fan with Remote, DC Motor with 12 Speeds and 24-Hour Timer, Oscillating Electric Fan with LED Display, Floor for Bedroom Home About this itemEnergy saving: DC motors have lower energy consumption and higher efficiency, typically saving 30%-50% more energy compared to AC motors.Low noise: DC motors operate with less noise, making them suitable for environments that require quietness.Good speed control: DC motors can achieve precise speed control by changing the voltage or using pulse width modulation (PWM), resulting in smoother wind speed adjustment.Long lifespan: Brushless DC motors (BLDC) reduce mechanical wear, leading to a longer lifespan.