Do they make a tool that can be attached to the wires at the controller so that you can actuate all the valves from a wireless handset. I know that there are new controllers that you can do this but I am more interested in being able to work on old controllers. I want to be able to hook up about 24 lines then go into the field and actuate the valves one at a time without coming back to the controller area. And I want the thing to be battery operated. Is there such a tool?