For controlling up to 4 24 V Irrigation Valves. System can be expanded up to 12 valves using GARDENA Expansion Module 2040. Cable connected to the valves. For indoor and outdoor use. Up to 4 programs per valve. Watering time of all valves can be adjusted centrally from 0 - 200 %. Master channel for controlling a pump. 9 V alkaline battery (not included) for power failure protection. GARDENA Rain Sensor or Soil Moisture Sensor can be connected