• They provide protection against electromagnetic radiation and effectively relieve headaches, insomnia, and hair loss. • They ensure sleep, vitality, and health while protecting the body's biological field. • They use negative magnetic ion technology to absorb and neutralize positive ions generated by electronic devices. • Ultra-thin and lightweight material that does not add weight to the device. • Self-adhesive and easy to apply on the back of phones or surfaces of electronic devices. • Effectively absorb and eliminate WiFi and 5G EMF waves. • They do not degrade and do not require annual replacement. • They can be used on smartphones, computers, laptops, air conditioners, refrigerators, microwave ovens, printers, washing machines, etc. • Portable and sufficient for daily use, ideal as a gift for family and friends.