If you can't get wire from you automatic sprinkler valves to your timer or don't have access to power, the Hyrdro-Rain HRC 900 Battery Powered Controller could be a nice option for you. You can find it from Sprinkler Daddy at http://www.sprinklerdaddy.ca/catalog/item/7033165/7692047.htm In this video Sean from Sprinkler Daddy demonstrates how easy it is to install your Hydro-Rain HRC 900 Batter Powered Timer.