Nikou Greenhouse Window Opener Automatic, Greenhouse Vent Opener Automatic Solar Heat Sensitive Window Vents Prevent From Overheating

Automatic design: Effectively change automatically with the temperature, maintain the best growth temperature and prevent the greenhouse from overheating. Solar energy design: as the temperature increases or decreases, the greenhouse vents are opened or closed, which is highly practical Instructions for use: Please make sure that your greenhouse window can be opened freely at least 45 cm (18 inches). Easy to operate: it can be clamped or screwed on the greenhouse frame.Greenhouse window opener