handiii is a myoelectric prosthetic hand designed to offer flexibility and choice. Myoelectric bionic arms are prosthetics that people who have lost limbs can control intuitively through faint electrical signals (myoelectric) in the muscles, which are measured on the skin remaining on the arm. The technology has been around since prewar days but its extremely high cost has limited its penetration of the market. handiii uses a 3D printer and smartphone in order to keep the cost of the materials under 30,000 yen. Whereas previous bionic limbs would attempt to conceal the loss of the hand by imitating human skin in the design, handiii offers a choice of look to match the environment in which it is being used or the feelings of the user, just like a watch or sneakers. By adding extendibility through IC chips and microphones in the fingertips, handiii is a bionic arm that aspires to be the envy of a large number of people. It is currently being developed for commercialization in partnership with users.