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. For smaller areas to water, you'll need the Quick-Snap Spray which is not included in this kit. The swiveling hose connect makes it easy to snap on the hose from any direction. Instructions are included and they are very simple. These are industrial strength sprinklers that will give years of faithful service. Depending on your water pressure, you can string two them off the same hose line using the Y-connectors which are included; you can even add a timer at the faucet. These units can be removed and taken with you to the new house when you move. Worried about winter freeze damage in your area? You may want to order a Quick-Snap Air Purge. It blows out the water with a blast of air from an ordinary bicycle pump (You must supply the pump). Each sprinkler comes with its own hose quick-connect and a bright orange cap to help find the unit when the grass grows long, lush and green. Lawns don't move. Why keep moving sprinklers around? Bury them, instead. Powerful compact sprinklers hide in your lawn just like a contractor installed system Pops up with water pressure and automatically drops down when water's off so you can mow right over it Snap on hose from any direction and water up to 5000 square feet each--an 80' circle Easy to install in minutes; set the spray pattern you want and forget it Includes 5 Sprinklers with 5 hose connectors and 3 hose Y splitters