Who we are?brWSTA specializes in researching> developing designing, manufacturing and marketing of health products including air purifier portable fan, car products humidifier, aroma dehumidifier and some other consumer electronic products.,br>brOur company Shenzhen Vansu Technology Co. Ltd> the WSTA brand owner started its business from 2013, is a subsidiary of the Wangcheng Group which was founded in 1997.br