Set includes a GARDENA Water Timer and GARDENA Soil Moisture Sensor for automatic control of sprinklers, drip irrigation systems like the GARDENA Micro-Drip-System or the GARDENA Sprinklersystem. The Soil Moisture Sensor opens and closes irrigation based on the moisture level of the soil. If the soil is moist enough, irrigation is not started. The GARDENA Water Timer is connected to the tap and connected to the Soil Moisture Sensor with the cable. The desired moisture level can be set with the rotary knob. The watering time can be flexibly selected, e.g. every 12, 24 or 48 hours, only nights, only during the day, or a combination of day and night. The watering duration can be individually set from one minute to up to 120 minutes. For operating the Water Timer, a 9 V alkaline battery is required, for the Soil Moisture Sensor two 1.5 V alkaline (LR14/C/Baby) batteries (not included). These ensure reliable measurement results for approx. one year.