Fecha de publicación: 12/12/2017 Fuente: Wipo "IOT" An object of the utility model is to provide a NB IOT prevents losing school badge. NB IOT prevents losing school badge by NB IOT module and school badge main part constitute, and the school badge main part includes information storage district, tag slot. NB the IOT module is led to bonding technology with the school badge main part and is bondd together. The utility model discloses the student position of can accurate sureness wearing the school badge still has low power dissipation, long service life's characteristics simultaneously.