Features: Meter cage technology, tested and verified, effectively shielding against harmful frequencies and electromagnetic waves present in smart meters, blocking 99% of harmful radio frequency signals. It effectively blocks harmful electromagnetic waves, creating a perfect protective barrier in your home or office. New design technology makes the smart meter cover more portable, lightweight and easy to fold. Whether travelling or on business trips, our product is simple to remove and reinstall, and can be carried with you. An adjustable white strap at the base allows for customised tightness according to requirements. Universals for straightforward installation: measuring 7.0inches in diameter and 4.0inches in height, this circular smart meter cover fits all round smart meters available on market. Specifications: Component: copper nickel fiber Size: 17.8x10.2cm/7x4in Application areas: shielding signals Package Includes: 1PC Digital meter protective cover note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.