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An emf shield decreases the amount involving electromagnetic fields within an area. They are made of magnets or conductive elements. EMF glasses that are high-frequency are usually more expensive than their lower-frequency counterparts. This article explains the differences between the two types , and also their efficiency. This information will help you make the best choice for your needs. Whether you require the emf shield for your computer or a necklace, you'll find typically the answers to these types of questions in this kind of article. High-frequency vs