The BLUMAT Areal-blumat is a flat, porous base made of clay, the detector, and a Blumat membrane head. A dripping hose is with it as well. You fill the base of the Areal-blumat with water and put it onto the garden fleece, that makes it work like a detector for humidity on the fleece. It's membrane head now controlles the flow of water through the dripping hose onto the fleece. That's how  the system controlles, how wet the fleece and the plants are. The dripping hose is connected to the supply hose, wich is connected to a water tank. So the plants, you can say, are watering themselves on their own.

For little tabletts, with only a few plants, a single dripper (without drip devider) is enough. The open end for example can  be 20-30 cm long. For larger areas additional drip deviders are necessary.

It's important not to have the open end of the dripping hose too close to the detector, for the membrane might shut too quick and the fleece won't get enough water.