Gardena 1810 Comfort 3-Cycle Digital Water Timer/Computer C 1030 Plus Electronic data display Watering up to 3 times a day. Watering time up to 7 hours and 59 minutes. Approx. 1 year running time with 1 x 9 V alkaline battery (not included) GARDENA Rain Sensor electronic and Soil Moisture Sensor can be connected.