I have purchased several of these. I love them. There are no directions so once I figured out how the machine worked, I typed up directions for my clients. Once you figure out how to use it, then it is very easy to use. It works great and really pulls out a lot of positive ions, toxic materials, from the lymphatic system through the meridian lines throughout the body. You can actually see the colour change as a new organ begins to dump toxins. Get the chart, and you will also want Himalayan pink salt, pan liners and a pan. The tub that they sell here for this purpose is also great because it has the leg groves. The case for this is also very nice because you can take it places and not have to worry about the safety of your machine. Word to the wise, if your machine starts sending off the alarm turn it off right away. The red button on the back. Otherwise, if you don't then you can damage your machine. This indicates you have too much salt in the water. If the salt is not registering and you know you have salt in there, then your array is bad and needs replacing. In the future, you will want to get a higher quality wrist band. The one that comes with this machine is not a good one. A new one, found on here, is great because it helps to do a better job and the cord is thicker so you do not have to worry about breaking the wire. Just what I recommend.