High performance: Duct fan 100 mm, power 40 W, speed 2800 r/min, air volume: 310 m/h. Based on the rechargeable design of the fan of a jet turbine motor, it provides stronger passage fan winds and reduces the noise caused by high air speeds by approx. 30 db.Adjustable 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.Copper wire motor: The duct fan is heat resistant with a full copper wire motor, a source of high airflow, stronger and more than fans of the same power. Fan casing is made of high quality ABS material, oil, moisture and corrosion resistant, MTBF up to 30,000 hours, Suitable for placement at air temperatures from -20 to 60.Easy 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.Wide 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 , perfect for offices, schools, bedrooms, kitchens, lofts, basements, farming tents, etc.Plug Type:US Plug, it applies to Canada, India, Mexico, Thailand, Taiwan, the United States, the Philippines and so on./EU Plug,it applies to Indonesia, Germany, France, Spain, Italy and so on.Voltage:AC110V/AC220VColour:BlackMaterial:Plastic Package Contents:1 * exhaust fanOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the