EASY TO USE - The stickers can be applied to phones, laptops, tablets, computers, TVs, and other small electronic devices. Simply place a sticker on the back of your phone or on the surface of your electronic device. EFFECTIVE - Each sticker provides protection from EMF/EMR produced by phones, laptops, tablets, computers, TVs, and other small electronic devices. PROTECTION - Common electronic devices normally emit EMF (electromagnetic frequencies) and EMR (electromagnetic radiation), which can be harmful to people. The mobile phone protection sticker uses magnetic negative ion technology, which absorbs and neutralizes ions emitted by EMF/EMR. Slim Size: The thin and lightweight design won't weigh down your phone, and the ultra-thin design allows you to place it on your phone or any other electronic device. Take it with you and protect yourself and your family from radiation. Type: EMF Protection Sticker Color: Silver Material: Silicone Size: Diameter 28mm Package Contents: 20 x Sticker