According to the specifications, the heating system emits less than 2mG, but the heating elements inside may emit between 0.1-0.2mG. It is generally considered that 1mG is safe for sleeping, and the typical in-home EMF background ranges from 0.5 to 2mG. The heating elements distributed throughout the mat to preheat the crystals can be considered EMF-free. 2mG refers to small spots on the mat where bimetal safety switches are located. These spots may emit more EMF than the heating elements. The bimetal strips used in these switches are very small, measuring about half an inch in width and one inch in length, and protect the mat from overheating by interrupting the power if the main thermostat system fails. There are some videos with EMF testing on our YouTube channel https://Youtube.com/MediCrystal