Just like the water world other than that it seems like a stone. Watering lasts for nearly three-4 times. The bottom in the stone has a cork plug which acts to be a drip dispenser. The lower (vertical) water degree sensor switch sits along with the pump (developed that way), https://erickbongp.blogminds.com/the-single-best-strategy-to-use-for-plant-feeder-water-27413740