Most rain-sensing devices must first accumulate a set amount of rainfall before a switch is activated that interrupts the circuit from the controller and shuts off the system. In that "accumulation time," the system will continue to water, giving the appearance a precious resource is being wasted. Only the Hunter Rain-Clik, with its unique Quick Response feature, can command a controller to shut off immediately—not after a 1/4" or 1/2", but right when it starts to rain. The Rain-Clik can be mounted on an eave or any flat vertical surface like a wall or fence. A gutter mount is also available that allows for easy installation of the Rain-Clik on the edge of a gutter.