Future umbrella combination

The future umbrella, a necessity to facilitate people's daily life, will be invented in the future world. Guess what it is, it's an umbrella, don't underestimate it, its function can be great, don't believe it, I'll tell you later! The shape of this umbrella is very special. It is in the shape of a family of three with a J-shaped umbrella handle under it. The curved part of the umbrella handle has red and green buttons. The red button is to make the umbrella invisible, and the green button is to make the umbrella smaller, which can be controlled by sound proximity and is convenient. Umbrella is really useful. If it is raining cats and dogs outside, you can open this umbrella to keep out the rain. When your hand is too heavy, you can throw it high and press the invisible button, or you can use voice control to say, "Invisible, come with me." In this way, it can always fly into the air to shelter you from the wind and rain. You can't see it without an umbrella. You'll think it didn't rain at all. Umbrellas can not only keep out the rain, but also become smaller. If the rain stops now and you want the umbrella to fall from the sky and cancel its invisibility, just stand still and gently say, "The umbrella has fallen, and cancel its invisibility quickly." The umbrella will automatically fall down and put away. Because you have too many things in your hand, you press the green button or say to the umbrella, "umbrella, umbrella, make it smaller." Make it smaller and put it in your bag. Now, you should know the function of this future umbrella. Is it convenient?