This indoor-outdoor timer is so easy to use you can forget the instructions. Its intuitive zone-by-zone scheduling allows you to set watering times differently for each area of the yard, providing greener results with less water. By turning the dial to each zone, you can easily set custom days of the week, odd or even days, or a cycle number of days independent of all other zones. You can also set up to four different custom watering times of the day to water slopes and clay soils in short intervals to allow water to soak in and avoid runoff. Each zone's settings can be reviewed quickly with easy to read LED indicator lights.