Do you prefer your water still or sparkling? Or maybe medium? With Grohe Blue, you always have a choice. While you can draw regular tap water using the lever on the right side of the Grohe Blue, a twist of the left handle gives you chilled and filtered water, allowing you to adjust the carbonation level in three stages - still, medium, or sparkling. The color of the LED display on the handle immediately indicates which carbonation mix you have selected. Additionally, the LED display signals a color change and blinking when the filter capacity drops below 10%, indicating that the filter should be replaced. You can also set the water temperature to your personal preference between 6 and 10 °C.