I have one and I don't find the energy coming from this pendant to be very pleasant. I carried it around with me for a while. Even keeping it in my pocket somehow bothered my hip/leg so don't use it anymore. Watch for emf protection pendants from this ebay seller. They are handmade in small quantities. They are some of the best available:

http://www.ebay.com/sch/navitatek/m.html?_nkw=&_armrs=1&_from=&_ipg=&_trksid=...

This is the one I was referring to below:

http://www.ebay.com/itm/XLarge-Super-Chi-Orgone-Pendant-crystal-reiki-quartz-...