Toro PSS-KIT Precision Soil Moisture Sensor Kit Automatic Calibration The sensor will automatically detect the soil type and adjust all calculations accordingly Freeze Detection The only soil sensor to offer freeze detection that prevents irrigation when temperatures approach freezing Signal Strength Indicating LED A multi-color LED on the sensor probe indicates radio signal strength to assist in finding a suitable installation location Slim Design The sensor probe's ultra-slim 3/4" profile allows it to avoid being damaged by mowing equipment Wireless communication up to 500 feet