https://www.sciencedirect.com/science/ar... Here's the actual article. The RF is what would come from your wifi, ELF-MF is what would come from the AC current in your walls. Good-ish news on the RF side of things is that it seems that it's just the tablets (with or without internet connectivity) that are shown to be dangerous devices (by this study, at least); cell phones showed no increased risks. I'm also a bit curious about why ELF-MF is so much higher in Mexico City (where the study was conducted) than global average. Interestingly, wifi and Bluetooth headphones are never mentioned.