Hunter’s Pro-C series is built around a simple idea: irrigation control that grows with your landscape. The PCM300 is the entry point—a three-station plug-in module that turns a compatible Pro-C controller into a working system. The real value is modularity. You don’t need to replace the whole controller when your garden expands. Just add another module, up to 15 stations total. For anyone planning phased landscaping or managing a property that evolves over time, that flexibility saves both money and hassle.

At 2.08 ounces and roughly the size of a deck of cards, the PCM300 slots into the controller’s bay with a solid click. There’s no wiring or programming required—just plug it in and the controller recognizes it automatically. Each station supports standard 24VAC solenoids, so it works with most residential sprinkler valves. The module itself is unassuming, but it handles the core job without fuss: reliable signal delivery, no ghost zones, no skipped cycles.

One honest note: this is a module only. You need a compatible Pro-C controller base to use it. If you’re starting from scratch, factor in the cost of the main unit. But if you already own a Pro-C or plan to buy one, the PCM300 is the cheapest way to add zones without swapping hardware. It’s a small, practical piece of a bigger system—and that’s exactly the point.