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Cell phone safety products fall into two main types, hands free kits and antenna radiation shields. While each type of product may help to some degree, there are reasons to be skeptical about the more extravagent claims that are made about their benefits. For each product type, there are not only ways in which they might reduce the risks of cell phone use, but also ways in which they might increase those risks. Those who buy cell phone safety products should therefore be careful. Buy products that have been shown to have beneficial effects in independent testing, and make sure that you know how to use your product effectively.
To read about the potential benefits, and risks, of the two types of cell phone safety product, see the sections on Hands Free Kits and Antenna Radiation Shields respectively.

http://www.emfnews.org/Lifewave-Cellphone-Matrix-Shield-Test.html