EASY TO USE - the stickers can be applied on phones, laptops, tablets, PC, TV and other small electronic devices. Just place a sticker on your the back of your phone or on the surface of your electronic device.<br> EFFECTIVENESS - Each sticker can safely from EMF/EMR produced by phones, laptop safe, tablets, PC, TV and other small electronic devices.<br> WHAT IT DOES - Regular eletronic devices normally emit EMF (eletromagnetic frequencies) and EMR (electromagnetic radiation), which can be harmful to humans. cell phone protector sticker uses a magnetic negative ions technology, which absorbs and neutrilizes ions that are in EMF/EMR.<br> Slim size: The thin and light 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 take it with you! you and your from radiation.<br> Type:EMF Protection Sticker<br> colour:Silver<br> Material:silicone<br> size:Diameter 28mm<br> Package Contents:<br> 20 x Sticker<br> Only the above package content, other are not included.<br> Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.