Taking a bath is one of the most water-consuming items in our daily life. Perhaps many people do not know how much water is consumed for a bath, so it's hard to bathe with restraint, which results in using a great deal of water. Using this water-saving shower can save some water. There are several blue LED lights on it. Every time 5 liters of water are used, one of the blue LED lights will be lit up. Thus, we can roughly know how much water has been used. In fact, such conception is very successful. The result shows that using such water-saving shower, people usually use 10 liters less water on average. As an energy-saving product, it is very suitable for promotion.