Of course it's perfectly legal. It's the whole reason radio was invented. If it were illegal, AM crystal radios would also have to be illegal. That's where r

Of course it's perfectly legal. It's the whole reason radio was invented. If it were illegal, AM crystal radios would also have to be illegal. That's where radio all started. Also, your phone harvests RF energy every time you charge it wirelessly with a Qi charger. Lots of implanted devices are powered this way too