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by gh02t 3237 days ago
[Probably] not enough to cause any harm. RF isn't dangerous until it is powerful enough to cause local heating and obviously this wasn't that powerful. I can't really find much info on how much power Theremin's bug took, but modern backscatter radios usually operate at very low power, at the level of ambient RF from normal radio etc but can transmit 10 km or more. Based on other designs I've seen I suspect it wouldn't actually take much, though that is just an educated guess.