The light doesn't come on when you press on. You have to press the head into your skin and keep the pressure on to keep the light on. The treatment is 14 minutes so you better not have a sore arm or hand (which I do) and your pain better be in a place where firm pressure can be applied on a relatively flat body part. I was no better at the end of the treatment, and had the imprint of the device left on my knee from having to use so much pressure to keep it lit. The fan that was supposed to come on at 3 minutes did not come on. The instruction manual is a joke, and there is no contact number or website provided. I tried calling the technical support for the company indicated on the box, Roscoe Medical, Inc., and they said they couldn't answer any questions and to go back to where I bought it for technical support. I tried to explain that Overstock.com is a retailer, not a technical authority on infrared light therapy. The tech support rep finally admitted that she knew nothing about these or any of the products they sold, so you can forget using them as a resource. I tried finding a website for NuVita, and no luck. All I found was a corporate wellness thing with the same logo. While the logo is the same, apparently there is no connection with the products sold with that logo. There is a one year warranty but no contact information, just the fact that it is made in China. This is disappointing.