I bought this great massager after Christmas. It is a one piece unit that your feet fit right in. You have a button that turns on the heat and a seperate button that turns on the vibration. I found that this item keeps my feet warm and comfortable while I am working at my computer all day. The foot massager is a one size fits all. My husband who has a size thirteen shoe can fit in this massager with no problem. I personally think this is a good product and worth checking out. I was more than willing to pay full price for this item which was over fourteen dollars. I was very lucky that I got the massager so cheap. I bought mine at Walmart while shopping for after Christmas specials. You can plug the foot massager into a wall socket or use four AA batteries to operate. I like the fact that I can use the massager on heat only as well as on vibrate only.
There is a causion on this item for people who are pregnant, suffer from heart problems, expecially if you wear a pacemaker, diabetes, tuberculosis, benign or malignant tumors or have conerns about your health.
I do not have any of these problems so I just pluged in my massager and enjoyed my day.