**Update - I've had this for almost 3 years, and it's still working great and working well for me. I've went through periods of time where I forgot about it and put it away, and the past few months I've been using it again more. I'm working with a professional monthly long term for some serious issues, and she actually has this exact mat and brand in her office offering sessions for clients which surprised me. When I first started seeing her I was in bad shape. I told her I had the same mat as her, and I asked her what frequency I should use. She said back then my body couldn't handle it yet. After a few months with her I finally was ready and started working with the mat again which is helping very much. **I ordered the HealthyLine Rainbow Chakra Mat Gemstone Heating Pad with Negative Ions and Red Photon Lights - Inframat Pro 3rd Edition - Firm (Small 40 x 20 inches). This is a very heavy mat and almost 20 lbs. It comes with a dust protector and a quality pad that goes around the mat along with a bag, the product catalog (that's impressive), warranty info, extensive directions in a large, high quality booklet, and an extra bulb it looks like. There is a very heavy duty and thick plug that you plug into the mat for your power source. You may need to use a little bit of muscle at first to push it in there so it is flush. The controller is large and lights up.First, you can choose the temperature which goes all the way up to 158 degrees. You can switch between Fahrenheit and Celsius. You have a timer, a PEMF setting that goes up to 30hz, and a photon light settings. The photon lights will go off after an hour which you could restart if you would like.I'm not going to go to into the directions because they are very extensive and the very high quality manual explains all of this since everybody is going to have different needs. Personally, I want all of these features every time I first get in the mat, but you can pick and choose if you only want certain ones. There are rules as well with each one to make sure you don't overdo it, they give recommendations, and they explain in detail and answered several of the questions I may have had. If you are putting this up to the highest setting with heat, they don't recommend going past a certain time, and with anything like this, you need to drink a large amount of quality water before and after because this uses a lot of energy and resources. The highest heat setting is known as a sauna setting. Personally, I would not do any cold showers or get in the cold after you receive these frequencies so your body can reap the rewards of the heat. I use a terahertz wand that has heat, and you are not supposed to get your body cold for 4 hours after using one of these heated devices so your body can heal better as the heat penetrates deep into the cells and bones. Heat is a very important for some, and others it is actually negative where they need cold or ice cold since every issue in the body requires different things. Personally, some things flare up if I have the heat setting on so I avoid it now. You can even sleep on this at night, and they talk about this, you will just want to be careful with the temperature. I don't feel it's comfortable to sleep on, however, as it's a hard, heavy mat.I ordered the small version, and it seems like this is the smallest of these body mats that the company has. They do have small, square ones that are meant to be on a chair. I'm 5 ft 4, and if I lie flat on this mat, I can actually match up my chakra system with the chakra system in the mat. If you hit the photon button, you can have all red lights, or you can turn it off and back on and have all red lights. They recommend using the padded cover to protect the mat from sweat. I did notice some information on their website and the manual contradicted itself regarding keeping the cover on, ultimately I read you will still receive the therapy regardless if the cover is on as it goes through it. I would just avoid layers of clothes.The frequency of Earth is 7.83 hertz, and you could set your mat to that frequency. You have to choose number 7 or 8 as there aren't fractions in setting. You can intuitively look up frequencies for certain issues or ask a professional if you're working with one. They're all over the board.I have tried the hottest and sauna setting which is incredibly hot. I can handle it, but it can make you pretty sweaty especially depending on the climate you are in. I can tell that uses a great deal of resources, and if you are new to this type of healing or you are not seasoned in detoxing your body, you could have a Herxheimer reaction. That's when your body releases and detoxifies too fast where it can be uncomfortable. I don't have any time to be slow in my life and have a lot on my plate, so I jumped all in with this using it several hours a day. I've also been doing major detoxes with other technologies where I feel I've been through much if that already. The first two...