1.Effectively reduce harmful objects: these protective stickers can effectively reduce the exposure of many electronic devices, absorb harmful objects, and counteract harmful effects of various electronic devices, providing comprehensive protection for you and your family2.How it works: these protective stickers for mobile phones are made of protective film and negative ion film and release negative ions that neutralise positive ions produced by various electronic devices to protect our health from practical accessories in our lives3.Good Adhesion: these protective stickers are self-adhesive, easily adhere to multiple smooth and clean surfaces such as metal, wood, glass, plastic, etc., easy to insert and remove without leaving any obvious residue. Good adhesion can help you in the long term4.Applicable occasions: these blockers are widely used in your daily life and can be glued to smartphones, computers, laptops, air conditioners, refrigerators, microwave ovens, printers, washing machines and other electronic devices. You can easily convert them into other harmless forms without blocking them signals5.Sufficient quantity: this pack contains 10 protective stickers, each approx. 2.54 cm / 1.0 inches in diameter, small and portable use, sufficient quantity to meet daily use and replacement Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.