How It Works What's Safe? Compare Products Shield Sham SAR Testing		Shields and deflectors are the two most common types of protective devices available today. Some are designed to fit over the earpiece and are made of a metallic weave that can include carbon lead and potassium. Others have a second part that fits near the antenna. Another common style is designed to fit over the antenna. These are often made of a ceramic / metallic composition designed to absorb radiation. Other manufacturers offer cases for cell phones that are made of a material that deflects the radiation. Manufacturers claim that these products will reduce the strength of the electromagnetic waves emitted from cell phones toward the human head anywhere from 50% to 99%. A number of these devices become saturated and have to be replaced. There is no clear indication when the saturation point is reached. Many scientists believe that most shielding products, particularly those that cover the antenna, create an even greater health risk by causing the phone to increase its output power in an attempt to receive the signal. When this occurs, the user is exposed to an increase in toxic radiation. Shields and deflectors allow a high percentage of toxic cell phone radiation to enter the body. These products do nothing to address the ELF radiation from the battery and circuitry of the phone. These products aren't addressing many of the frequencies emitted from the cell phone - the antenna as well as the circuitry and battery of the phone. These products can reduce the quality of the transmis-sion. Many shields have to be replaced due to saturation. Different styles often have to be used for different phones.