Guangdong Wintek Science and Technology CO.,LTD1.Trusty and Reliable Manufacturer. Established in 1996 in Guangdong Shunde in China, over 20 years OEM/ODM serving experience. 2.The most worldly well-known Chinese Supplier. Given supplier for many Supper Brands and hundreds of brands around the world. Yearly export 3 Million units. 3.Ideal Ventilation Solution. Include Window-mounted fan, Wall-mounted fan, Recessed Ceiling mounted fan, Duct Fan, Air Purifier, Disinfection Robot.4.Safest choice. ISO9001 Certified. Products pass 3C/ETL/SASO/CB/CE/SNI/SAA/ROHS/Energy Star.