What is the rain delay feature and how do I use it on the 27894?

Rain Delay allows you to pause your sprinkler timer from watering for 24, 48, or 72 hours due to rain or other factors. To use it, turn the dial to AUTO, press the RAIN DELAY button to automatically delay for 24 hours, then use the +/– buttons to increase or decrease the delay time if needed. Press ENTER or wait 10 seconds to activate the delay. The display will switch between actual time and remaining delay hours every 2 seconds.