YOKO is not a gadget or gimmick, it is scientifically designed using latest computer technology,based on significant human growth medical research in Japan andancient Chinese massage knowledge.Human engineering concepts have revealed that the stimulation of the pituitary glandcan be effected by the use of a special, computer designed height stimulator at the feet.It is based on these findings that the YOKO height-increasing device was invented.YOKO has been designed and developed to stimulate the 'nerve points' at the sole of thefeet for optimum impact on the pituitary gland to encourage the release of growth hormonefor human growth. Thus, helping you grow taller in a totally safe, easy and convenient way.