The Precision™ Soil Sensor is a wireless soil moisture sensor that signals your irrigation controller when to water and when not to based on the moisture level of your soil. With no sensors to bury or wires to run, irrigating your lawn and surrounding landscape becomes worry free. The Precision™ Soil Sensor is available as a retrofit to your existing controller – even those not made by Toro – or as part of the Toro® EVOLUTION Series Controller’s suite of wireless accessories.