No, the Carbon+ EMF Harmonizer Chip does not block EMFs. Instead, it works better than blocking! The chip neutralizes the electromagnetic radiation coming from the device it's attached to. And in doing so, helps shield your health from the damaging effects of EMF exposure. A common misperception is that blocking electromagnetic radiation is possible. In fact, It's not possible for an EMF protection sticker to block electromagnetic radiation. The only real solution is neutralizing the radiation and it's why our chip is the only "EMF shield" that works. Yes, it IS an EMF anti radiation sticker because it protects you from radiation coming from WiFi or cell phones, but no, it is NOT a radiation blocker sticker. This is good news because your cell phone, router, etc. will continue to function normally. If the EMFs were blocked your devices would no longer work properly. This also explains why the anti-radiation effect cannot be measured with an EMF meter. The effects are best measured with physiological tests of your health parameters when using it. See our research here.