EASY TO USE - The stickers can be applied to phones, laptops, tablets, PC, TV and other small electronic devices. Simply place one sticker on the back of your phone or on the surface of your electronic device. EFFECTIVENESS - Each sticker can safely block EMF/EMR produced by phones, laptops, tablets, PC, TV and other small electronic devices. WHAT IT DOES - Ordinary electronic devices normally emit EMF (electromagnetic frequencies) and EMR (electromagnetic radiation), which can be harmful to humans. The mobile phone protection sticker uses a magnetic negative ion technology, which absorbs and neutralizes ions contained in EMF/EMR. Slim size: The thin and lightweight body is not enough to make the phone heavy, and the new ultra-thin design allows you to put it on the phone or any other electronic device. You can bring it Protect yourself and your family from radiation.Type: EMF Protection StickerColor: SilverMaterial: SiliconeSize: Diameter 28mmPackage Contents:20 x StickerOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3 cm.