Usage Tips:Features: xHigh performance: Duct fan 100 mm, voltage: 220 V or 50 Hz-60 Hz, power 40 W, speed 2500 s or min, air volume: 310 m or h. Based on the rechargeable design of the fan blades of a jet turbine motor, it provides stronger passage fan winds and reduces the noise caused by high air speeds by approx. 30 db xAdjustable speed: This adjustable duct fan remote control offers two speed settings to reduce the maximum power of the duct fan from approx.. The wireless speed switch has an RF range of up to 25 metres in open areas and up to 15 metres through walls and doors. Battery powered, no wall wiring required for greater convenience xCopper wire motor: The duct fan is heat resistant with a full copper wire motor, a source of high airflow, stronger and more durable than fans of the same power. Fan casing is made of ABS material, oil, moisture and corrosion resistant, MTBF up to 30,000 hours, durable. Suitable for placement at air temperatures from -20C to 60C xEasy to install: the heater's exhaust fan has a unique modular design for quick disassembly and easy maintenance, and a 1 metre power cable for your daily needs. You can choose from a variety of mounting options: ceiling mounted, L-bracket or wall mounted etc xWide range of applications: the intelligent duct fans are suitable for use in homes, restaurants, industry and horticulture for ventilation and clean air to protect public health. Moves large volumes of air quietly and efficiently through the ventilation system, perfect for offices, schools, bedrooms, kitchens, lofts, basements, farming tents, etc. Specifications: xCurrent: 0.23 or 0.22 A xPower: 45 or 48W xSpeed: 2500 s or min xAir volume: 290 or 310 m or h xNoise level: 29 or 30db Package Contents: 1xexhaust fan, 1xremote control, 1xinstructions Note: 1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2. Please allow slight manual measurement deviation for the data.