Shop name:Chong Qing Shuo Yue Ke Ji You Xian Gong Si Each sticker can safely shield 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. Our cell phone protector sticker shield uses a magnetic negative ions technology, which absorbs and neutrilizes ions 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 new ultra-thin design allows you to put it on the phone or any other electronic device. you and your family from radiation. Type:EMF Protection Sticker color:Silver+gold Material:Silica size:Diameter 28mm Package Contents: 10 x EMF Protection Sticker Only the above package content, other products are not included. Note: Light reflection and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.