Gardena Digital Electronic Water Smart Flow Meter for Garden Hose Watering Easy operation  With one press of a button, you receive an overview of the water consumption. Safe operation The impeller indicator on the display rotates for as long as water is flowing throug Irrigation according to requirements  as much as needed and as little as possible The Water Smart Flow Meter is equipped with a round cell battery and can be reliably used right away Read clear measurement values  act immediately As you know the water consumption