The Hydro-Rain HRC-100-04-NA is a 4 Station Indoor or Outdoor Sprinkler System Valve Controller. The HRC100C Series sprinkler controllers are indoor/outdoor timers enclosed in an UL approved case capable of 4,6,9 or 12 watering stations. The HRC 10004NA water budgeting feature allows you to set watering durations from 10 to 200 percent of the programmed time in 10 percent increments For use with any sprinkler system designsOrbit