If you are unsure whether a device emits radiation, you can check for a sticker that says the device meets FCC standards. If the device does not have this sticker, it may still emit radiation.
To be sure, you can contact the manufacturer of the device and ask about their radiation testing procedures.
In many cases, however, even FCC-approved electronics emit more EMF radiation than they are supposed to. In addition, the combination of electronics within your home or office adds up to a substantial amount of radiation, which is not factored in with FCC standards.
In general, any device or appliance that’s used near your body or uses wifi, cellular service, or electricity (especially smart meters, baby monitors, appliances, and anything using wifi, cellular or Bluetooth) will benefit from this EMF kit.