It is basically a big tub with a water resovoir at the bottom
You can find information about Earthbox online at the Earthbox website. Once on the page, scroll to the bottom and click on "About Us" or "FAQ" to bring up the information.
Sure they do. Just put on in a cup of dirt...around 20 ml of water daily and in less than a week you'll have a little sprout. Transfer to self watering conainer and put in full sun. The beans dry on the plant so if you live in a humid area of the country you may want to grow them inside using an earthbox or something similar. Climate control ROCKS!