Gear-driven rotating sprinklers just like the ones contractors install. Only you don’t have to trench the lawn or pay for buried plumbing. They stay safely buried in place until needed. You can mow right over them. Just snap your hose on to the swiveling quick-connect and water pressure pushes the riser up 5 inches above the ground. A powerful stream throws water 17 to 40 feet at 2.5 gallons per minute. You set the rotation from 40-360 degrees. Both settings are right on top and easy to make while the unit is on or off. When you turn off the water, the riser drops back below ground where it stays ready till next time. All it takes is a garden trowel to dig a 4 inch hole, 9 inches deep. That’s it: plant them, point them, set them, forget them. No assembly required. Plant them right next to driveways or sidewalks, in flower beds—anywhere, really. Corners are good spots. Most front lawns can be watered with just two, each in an opposite corner. The back yard will probably take 3.