Voltage: 220V / 380V. Fan pressure high pressure fan. Performance low noise fan. Power: 120W, 180W, 250W, 370W, 550W, 750W, 1100W, 1500W, 2200W. With filter in the Air inlet and outlet port to effectively filter soil and impurities, which keeps the inside of the fan clean 2. Heat dissipating net 3. Aviation aluminum Shell 4. 100% pure copper coil and high quality imported bearing 5. Stable operation, low noise. Large air volume, strong suction. High efficiency and energy saving.