Most rain-sensing devices work by accumulating 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. This unnecessary waste runs counter to the principles of conservation-conscious municipalities, businesses, and residences. With built-in Quick Response Technology, the Hunter Wireless Rain-Clik Sensor can command a controller to shut off right when it starts to rain. The sensor 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 on the edge of a gutter.