The GARDENA Water Timer is attached to the tap and automatically switches off irrigation of your garden, e.g. sprinklers or a drip irrigation system like the Micro-Drip-System. Watering times from five to 120 minutes can be programmed. The Water Timer starts irrigation immediately and stops the water flow automatically at the time programmed. For random water retrieval, it can also be set to permanent water flow. A battery is not required for operation.