|Here's the prototype of a small device that waters your plants while you're away. It is programmed to dispense a controlled amount of water to your plants on a schedule you select. With the 3 buttons in the bottom half, you can see the easy programming of this unit. Run by batteries, it is very energy efficient as it performs its job. A typical installation would have a water reservoir, possibly with additional nutrients blended in. Standard fish tank air hose plumbing carries the blend to the plant, or to several plants if you use standard aquarium t-taps and other fittings.