Contact window screen is gauze can automatic rewinding screens..Main is ventilated anti-mosquito use.Framework is tightly attached to the window frame, want to use the gauze pull down, need not when yarn network automatically rewinding to net box.Does not occupy a space, and sealing strong.And the coordination of high-grade household decorates.Rotary working principle: through the web will gauze collection.Open mode: manual, electric, chain bead.Open direction: vertical, horizontal all can.Folding work principle: through the gauze of fold (like accordion) collect gauze.Open a way: for manual. .Open direction: vertical, horizontal all can.