Size:254*89(round) Voltage:DC 24V/48V Rotation:2000~2500rpm/min Airflow:800~1000CFM Function:PWM Control Size:254*89(round)Voltage:DC 24V/48VRotation:2000~2500rpm/minAirflow:800~1000CFMFunction:PWM Control The product have good performance, light noise, light vibration, long life, easy to installation. The main using is in auto-equipment, UPS power source, medical equipment, stage light, computer ...