A timer that facilitates a user's scheduling and controlling of the
operation of an irrigation system for irrigating a property, the timer
including a base unit electrically connected to the valve, and a handheld
unit including a power source, a CPU, a valve controller, a memory
device, and software stored in the memory device. The irrigation system
includes a valve, a conduit, and a distribution unit that distributes
fluid over an irrigation zone of the property. The handheld unit is used
remotely from the base unit to modify an irrigation schedule of the
valve. The irrigation schedule is used with the valve controller to
operate the valve according to the irrigation schedule through
communication with the base unit.