I thought I had found the perfect solution to help my long standing neck pain. Unfortunately all the heady words promoting this product were all puff & wind. The metal frame prevents close contact with the skin unless excessive tension is applied to the handles. I rather doubt that there is any research tests to the vibrator for this application, it is noisy & if you lean against soft furnishings trying to relax the whole room becomes it's sound box. The heater is ineffective as there is a gap between it & the neck unless the same excessive tension is applied to the handles. There is a two year guarantee but I returned it after just a week of disappointing trials. The support team were very helpful & sent me a pre paid returns label.