Do you prefer your water still, sparkling, or medium? With Grohe Blue, you always have a choice. While you can dispense 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, and you can even adjust the carbonation level in three settings - still, medium, sparkling. The color of the LED display on the handle immediately indicates which carbonation level you have selected. Additionally, the LED display signals with 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.