The GARDENA Rain Sensor works in conjunction with GARDENA Water Computer by stopping irrigation during a rainfall and starting it again once the rain stops thereby lowering water consumption. The rain sensor will take natural rain fall into consideration during controlled watering and works with all electric water timers. It can be positioned in the soil or surface mounted and has an optical/electronic operating principle. KEY FEATUERS: Rain Sensor can be placed in a gravel-filled flower pot or directly on a solid surface It is compatible with the GARDENA MasterControl, MaxControl and FlexControl Water Computers Irrigation rain sensor has 5m cable plug that allows connection to a water computer is included The sensitive optical lens detects the start of rainfall quickly Made in Germany PRODUCT SPECS: Brand GARDENA Model Name GARDENA Rain Sensors G1189 Model Number G1189 Weight 0.4Kg