Each sticker can safely from EMF/EMR produced by phones, laptop safe, tablets, PC, TV and other small electronic devices.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.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.The thin and light body is not enough to make the phone heavy, and the ultra-thin allows you to put it on the phone or any other electronic device.Protect you and your family from radiation.Type:EMF Protection Stickercolor:Silver+goldMaterial:Silica gelsize:Diameter 28mmPackage Contents:10 x EMF Protection StickerOnly the above package content, other products are not included.Note: Light reflection 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.