SPW’s NODE-BT-100-LS skips the valve box entirely. This single-zone controller runs on batteries, so you can install it anywhere AC power doesn’t reach—think gardens, medians, greenhouses, or roundabouts. It’s fully waterproof, and you manage everything from a smartphone app that works in multiple languages.

The app maps each controller by location and sends battery-change reminders before you’re caught off guard. You can configure the schedule offline, which is useful if you’re setting it up in a spot with spotty cellular coverage. Bluetooth range is solid for typical residential yards, and the plastic housing feels durable enough for outdoor exposure.

The main limitation is the single zone. If you have multiple irrigation areas with different watering needs, you’ll need more than one unit. Battery life depends on how often you water, but the app’s reminders help you stay ahead of dead batteries. For a straightforward, no-wire setup, this works.