Features:Made of solicone, mineral elements and negative ion layer, it effectively absorbs and eliminates the threatening 5G Wi-Fi and EMF EMR waves generated by electronic devices, preventing electrical pollution while making your device look cooler.Self-adhesive sticker, you can easily stick it on the back of your phone or other electronic devices, and it is convenient to use.It can not only protects against threatening electrical pollution but also helps extend battery life, stickers can help improve the battery's function when charging or discharging, increasing battery capacity and lifespan.Special materials to absorb and transmit electromagnetic radiation waves to reduce the damage of phone radiation to the human brain up to 99%,will not interfere with phone signals, especially benefical for kids, pregnant or women who planning to have a baby.Wide range of applications, can be attached to tablet computers, cell phones, computers, refrigerators, TVs, air conditioners, microwave ovens, printers, hair dryers, washing machines, etc. Specifications:Material: Silica Gel+Negative Ion+Self-adhesive StickerColor: GoldDiameter: Approx. 28 mm/1.10 inchFunction: Protect Cell Phone From Radiation, Save Phone Electricity, Contain Negative Ion Energy Note:Please allow 1-2cm errors due to manual measurement,pls make sure that you do not mind before you mind. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes:1 Piece Anti-radiation Phone Sticker