Protection: Anti-Radiation stickers are designed to absorb, transfer, and eliminate threatening EMF/EMR waves and electronic pollution. EMF pollution and other threatening factors are caused by electronic devices.How to Use:1. Peel off and stick to the back of your phone or any other electronic device.2. Some devices may only require one radiation protection sticker, while others may require 2, 3 or more, depending on the nature of the device.Specification:Color: GoldMaterial: MetalSize: Diameter 2.6cm/1.02 inchesPacking list:Phone Radiation Blocker*6