Another new exciting product now available through Hunter is a Solar Sync. The Solar Sync monitors evapotranspiration (ET) and will adjust your Hunter controller based on the ET rate. On a daily basis, it measures sunlight and temperatures, then uses that information to adjust your controller. The information that the Solar Sync collects based on ET is used to adjust your Hunter controller for seasonal percentages. This may not be for everyone; a rain sensor will suffice in most cases. Commercial properties will benefit with the ability to lower watering durations with automatic altering based on current weather.