You can safely wear it for as long as you like.
It's a scam, foisted upon the gullible.
I must inform you that albertchong is correct in stating that a scalar energy pendant DOES have an effect on the human body. I would encourage you to at the very least spend a week with one before concretely assuming that it has no effect. I ordered one and received it yesterday morning. I'll share some of my initial observations, but first will say that I'm a person who appears to have a hypersensitivity to things like electromagnetic fields, so the pendant's interaction with me may differ from that of a more typical person. (In fact, it appears that people have quite a range of different reactions to these items which makes it more difficult to pin down exactly how they affect the body.)
That said, here are some of my early observations:
1) I felt a noticeable "warm energy" from it as soon as I pulled it out of the mailing envelope, when it was still inside of it's box. Even the Authenticity Card felt warm.
2) After about 3 minutes, I started to breathe really good. Felt like taking slow deep breaths, lungs felt more open. The ability to get more oxygen into my blood must be a good thing...
3) After about 15 minutes, I could feel it's presence against my skin more. It heats up my chest.
4) When I went to put gas in my car, I got a HARD zap when opening the cover to get to the gas cap.
5) The gas pump would not read my ATM card (first time ever, and I always use that pump), but the card worked fine when the gas station attendant ran it through her machine inside.
Now here's were it gets weird. I've observed that I'm distinctly more tired than usual, and less able to function normally. I took the pendant off about 40 minutes ago and haven't noticed much of a difference since then. The fatigue is unexpected since one of the main selling points of these pendants is that they're supposed to help you feel more energetic and improve mental clarity.
Anyway, I stumbled across this forum while searching for more information on the subject. Wondering if anyone else has had similar reactions to mine, and how best to make use of scalar energy products for health and healing?? I have many more questions than answers at this point, but have to disagree with:
You can safely wear it for as long as you like.
It's a scam, foisted upon the gullible.
You don't know enough about this subject to make that claim.