This protection sticker is compatible with various of electronic devices. It is made of special materials, can absorb and transfer the azimuth of excessive harmful radiation produced by sending and receiving signals of the mobile phone, laptop, tablet, computer etc. Thus avoid the radiation on the human brain damage and provide all-round protection for your health. The following tips can assist you to install. Step 1: Simply clean the surface. Step 2: Peel off the backing. Step 3: Apply for easy setup.