When you have an exceptionally large, open area to water, the fastest way to cover it is with a Nelson traveling sprinkler. Simply set it in place at your desired starting point, turn it on, and walk away. The automatic shutoff prevents water waste. A choice of three speeds lets you adjust the level of saturation to your lawn's needs. Cast iron body with chip resistant paint. Adjustable aluminum spray arms provide coverage range from 15' to 55' in diameter. 3 speeds to choose from (high, low, neutral). Automatic shut-off.