Voltage: 220 ~ 240V / 50hz, Air flow: 95 m/h, Rotation speed: 2100 RPM. The body and the blade are made of anti-corrosion ABS plastic, durable . 100% copper motor with thermal protection can work continuously without maintenance. Ideal choice for kitchen, bathroom, small garage etc., keep your home in good ventilating condition. Product Description Calculate required airflow for ventilation To determine CFM requirements, determine size of the room. Measure and multiply the length, width, and ceiling height of the room to determine the cubic length. Use the multiplication factor of 0.13 and round up to the next "tenth" (.10). Example 1: Bathroom with 8ft ceiling: 7ft wide x 9ft long x 8 feet high x 0.13 = 66. Select a fan of at least 70 CFM. Example 2: Bathroom with 9 foot ceiling: 10 feet wide x 9 feet long x 9 feet tall x 0.13 = 105. Select a fan of at least 110 CFM. Air blower To have a safe and comfortable living environment, a Adequate ventilation throughout the house is essential. Hon&amp;Guan fans provides the right solution to ventilate the room and continuously refresh the indoor air. It helps to remove excess humidity and keep the house dry and comfortable, thus preventing mold. Protection class IP45. Made of high quality ABS plastic, durable, anti-UV, easy to clean. 100% copper coil motor. < p>Copper motor with overheat protection. Suitable for window mounting or wall and ceiling mounting. Operating temperature range: -20~50 ABS Material The fan is made of high quality ABS flexible plastic, anti-corrosion, anti-aging. Protection class IP45 The bathroom fan with IP45 protection class, resistant to daily water and dust. Copper coil motor Built-in copper motor with thermal protection for smooth operation continuous without maintenance.