I purchased this, but I hardly used it. It is an authentic product. Please refrain from purchasing if you are nervous about it being stored at home. I am also listing this on other sites, so please send me a message if you wish to purchase it. Please note that I do not accept price negotiations or returns/exchanges. ------ This efficiently assists the two-handed swinging exercise (Swinging Shou) and contributes to health promotion. Because of its high far-infrared radiation efficiency, it can efficiently supply the energy generated by the two-handed swinging exercise to the human body. (From the instruction manual)