What is the function of using elevator energy saving products?

Our life is cannot do without the use of the elevator, so we were in the elevator products, if itself is not its business operations, and will never know, in fact, he was in a lift during the operation, the consumption of his monthly consumption is relatively high. If we do not have any energy saving operation on it, then the amount of electricity he consumes every month is a few times more than our ordinary household appliances. If we use the elevator energy saving product when we use the elevator again, does he have a certain effect on the saving of electricity?
In fact, we can see that elevator energy saving products can really play the role of energy saving, but if we buy this product, it will also cost a certain cost. So, in the course of our use, can it save the amount of electricity, can we compare the cost? Can we exceed the cost of buying this kind of energy saving product?
In fact, we can through a very simple technology, can understand, the ordinary elevator energy saving products, its price is not other expensive. When we buy, we can choose the product according to the energy consumption of the elevator. And we usually use an elevator for about 20 years, so if we take the whole calculation, we will find that after the use of energy-saving products, he has a relatively high degree of integrity.