Use this Flopro Mechanical Timer for automatic watering of your garden. It is ideal for adding to irrigation systems or simply to sprinklers to water your lawn. You can pre-set up to 120 minutes in 15 minute increments. Compatible with all watering brands. Features Manual override for convenience No batteries required Made from premium grade plastic Diameter: 25mm with 19mm & 12.5mm inserts 100% compatible with all watering brands Tap connector included. How to Use Find the correct tap reducer size to fit to your tap Screw on firmly to your outside tap Connect your hose with connector to the outlet Turn the dial to the required number of minutes The timer will shut off the flow of water when the timer has ran out