The present invention relates to a kiosk that dispenses products with no moving parts. The heat transfer medium comprises a light-transparent substrate coated with a plurality of nano particles. The control firmware enables the present invention to charge any type of mobile phone. As a result, the force of retaining of the protector can be enhanced, thereby avoiding a situation in which the protector is disengaged from the stay. The medium has no Curie point within a range of a temperature change of the magnetic bodies and removal.