Oh my gosh! This percussion massager works out those sore and tired muscles in a manner that gives almost instant relief. It literally melts those stiff, knotty muscles and spreads them out so they are not contracted.The massager has 5 speeds and comes with 5 heads and a convenient case for storage and transporting. The gun is light enough for most to use on your own legs and shoulders. You will need assistance for you back. There is no need to press, just let the massage gun do all the work. This is very well made and should last several years. It is well worth the purchase. You can find it here.