Have you always wasted a lot of time spraying your garden? Then you use the Gardena irrigation computer Flex Control. Connect the watering computer to your outside tap (inner thread diameter: 26.5 millimeters or 33.3 millimeters) and use the dial to set the time when the sprayer switches on and how long the watering computer needs to spray. The computer will spray for a maximum of 99 minutes. You also set the water interval to your own liking. This is possible from 4 to 72 hours. The computer works on a 9 volt battery (not included).