Don’t be left holding the hose. Simply set the amount of time the water needs to run, and hit the “on” button. This timer shuts off exactly after 1 minute or 120 minutes. Its spring loaded timer mechanism does not require batteries. The easy swivel metal coupling fits durably between one spigot and one hose. This simple device puts water where it is needed, when it is needed. From the manufacturer Gilmour, with a two year warranty. It may take a couple of tries to get the amount of water and its timing right, but once it is set, the Mechanical Water Timer is really a time saver.