SHLD Cell Phone EMF Harmonizer and Heat Reducer helps protect your ears, brain & body against the harmful effects of electromagnetic radiation and heating. Super slim and easy to stick you can stick SHLD on all your electronic devices you carry or that are in your home. All of your personal electronic devices emit (laptops, cell phones, tablets, etc.) Electromagnetic Radiation (EMR) or Electromagnetic Fields (EMF) that are comprised of Extremely Low Frequencies (ELF), Radio Frequencies (RF, Wi-fi, data etc.) and Thermal Radiation (heat), all of which are potentially harmful. Gamma Rays, X-Rays and UV are also types of EMR. EMR has a high decay rate which means that most of the exposure is felt within a few inches and especially with direct contact. EMR can penetrate most natural and man made materials including wood, plastic, pillows, blankets, clothes, etc.