The simple installation method of the water-saving device is as follows: First, the original bubbler is removed and the transfer interface is installed; secondly, the splash-proof head and the transfer interface can be screwed tightly to the splash-proof head. 1. The water saving device has two kinds of water discharging modes, namely foaming mode and shower mode, which can be adjusted by one button. 2. The shower head can be rotated 360° to adjust the washing direction and freely control the water flow. 3. It can be shaped after bending, and it is flexible and convenient to use.4. Made of stainless steel + ABS material, durable 5. The filter holes are even and fine, and the water is evenly distributed.