Feature: 1. This product has stepless governor, adopt PWM speed regulation which make the speed control more precise. 2. Adopt EC motor with 6-stage variable frequency brushless high-performance motor and durable double ball bearings 3. The fan operates with low noise, strong suction and large air volume 4. Aluminium alloy housing for better pressure resistance and durability, suitable for harsh environments 5. The turbo head is made of PBT material, which is not only environmentally friendly but also fireproof. 6. The motor adopts pure copper winding, high efficiency frequency conversion 7. Suitable for kitchen, bathroom, bathroom, internet cafe, chess room, health club, beauty crown, solder, warehouse, computer room 8. The motor has overvoltage protection and lock protection function(automatic restart) Specification: Condition: 100% Brand new Voltage: AC 220V 50HZ/60HZ Power: 150W Standard: 10 in Color: Blue Air Volume: 1808m³/h, 1065CFM Maximum Noise: 65dB Maximum Speed: 3200RPM Turbo Head Material: PBT environmental protection Wind Pressure: 510PA Fan Blade Design: Mixed flow Fan Housing: Aluminium alloy Waterproof Rating: IPX4 Weight: 4730 g / 166.8 oz(approx.) Package List: 1 x Duct Fan