The GARDENA Water Computer MultiControl calendar function is attached to the tap and controls the automatic irrigation of your garden, e.g. sprinklers, a drip irrigation system like the Micro-Drip-System, or the GARDENA Sprinklersystem. The programming of watering times is easy: The operating unit with the large and clear display can be removed for easier programming. The display clearly shows which programme steps are to be carried out in which sequence. With the large, easy-to-use rotary knob, the desired data can be quickly adjusted. Daily, up to three watering intervals with a duration each of one minute to 7 hours 59 minutes can be selected. Additional flexibility: the desired watering days are also freely selectable. For water-saving operation, a GARDENA Rain Sensor or Soil Moisture Sensor can be connected. A purely sensor-controlled irrigation with the Soil Moisture Sensor is also possible. For operation of the GARDENA Water Computer MultiControl calendar function, a 9 V alkaline battery is required (not included). This ensures secure operation for about one year. The integrated battery level display indicates when the battery needs to be changed.