Thank you for viewing this product! This product allows you to switch to a shower function with a single push. Using the shower function can be expected to save water. I am selling this because the size did not fit. Although this product is almost new, please understand that it has been stored at home, and only purchase if you are okay with that. [Product Description] ● Switch with one push! ● Switch to shower with one push ● Hot water can also be used.