Rocsai 3/4-Inch Single Station Garden Mechanical Watering Timer Controllers Programmable Dual Way Watering Timer System The 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. Timed watering from 5 to 120 minutes can be programmed. The Water Timer starts irrigation immediately and stops the water flow automatically at the time programmed. No batteries required. it can also be set to permanent water flow Durable high impact construction, Oversized dial with comfort grip for easy use, Saves water in drought conditions