The Wind-Sun Sensor provides protection for your awnings by automatically retracting them whenever strong winds are detected. Highly recommended for all awnings the sensor offers constant protection – even when you are not home. Your external awnings react automatically to the weather. As soon as the sun comes out, it extends out automatically, and your patio and rooms are shaded and remain cool. Maximum convenience! Also, if strong winds threaten, your awning retracts automatically.