Rf 433Mhz esl solution

Sertag E-ink Electronic Tag Tricolors 7.5 inch For Healthcare is Rf 433 MHz frequency ,For the retails, warehouses and so on

Sertag Rf 433Mhz E-ink Electronic Price Tag Tricolors 7.5 inch is Rf 433 MHz frequency ,For the retails, warehouses and so on