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cheesemoo says...

spoco, I'm guessing it uses terahertz radiation, which lies between the radio and infrared bands. The power levels involved are probably in the 1-10 watt range, and terahertz radiation isn't ionizing like X-rays, so I'd say the risk involved is probably rather low, even after multiple exposures. Rather on the level of talking on a cell phone or wearing a Bluetooth headset.

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