I ordered this item and soon found that it was of poor quality and lacking instructions for making adjustments.By trial and error I found some of the adjustment controls but most of them did not function as would be expected.The main problem encountered was the green plastic area adjusting clips.They were supposed to be set by moving the green adjusters but as soon as the sprinkler was switched on,the green adjusters moved freeely and altered the desired setting. The serations on the body of the sprinkler where the green setting clips fitted were far too loose and would not remain in the position chosen. I cured this problem by fitting a small "O" ring on the adjuster clips so that they were held in place thus preventing movement.
In all,the sprinklers are far from being fully fit for purpose. In view of the price, I chose not to return them.
My advice to potential buyers is to look at the better quality pulse sprinklers shown on E Bay.