The most efficient way to control watering in your garden. The adjustable frequency dial allows you to control how frequent the garden is watered, from 1 hour up to 1 week. The adjustable run time dial controls the duration of watering, from 1 minute up to two hours. Simply pop onto your garden tap and adjust the dials as required. Fits 18 and 25mm tap outlets. Requires 2x AA batteries (not included).