Features: It can be connected to the speed controller. The fan has two speeds, high speed and low speed. The default high speed mode. High wind pressure, high air volume, high efficiency, low energy consumption and low noise Externally-rotating motor, using NMB bearings from Japan, with a life of more than 50, 000 hours 4. Snap design, easy to assemble and disassemble, it has good sealing 5. Available in two styles for choice: 220V and 110V 6. Suitable for kitchen, study, office, cinema entertainment, workshop, bathroom, internet cafe, chess room, health club, beauty crown, solder, warehouse and computer room Specification: Condition: 100% Brand new Item Type: Duct Fan Pressurization Mode: Oblique flow pressurization Model Level Voltage / frequency (V / HZ) Current(A) Power(W) Speed(RPM) Air Volume(CFM) Air Pressure(Pa) Noise(dB) HF-125P High 220-240 / 50 0.14 33 2550 167 159 32 Low 0.13 28 1850 146 106 26 Model Level Voltage / frequency (V / HZ)