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> PurePulse uses safe LED lights to detect blood volume changes right on the wrist to deliver heart rate monitoring 24/7. Is there such a thing as an unsafe LE
by dantiberian 12y ago
> PurePulse uses safe LED lights to detect blood volume changes right on the wrist to deliver heart rate monitoring 24/7.
Is there such a thing as an unsafe LED?
- wahsd 12y agoMaybe ones that put out UVA and UVB rays? Just a stab in the dark.