LX70 EMF-Protection Window Film is the best we know of. It is almost indiscernible to the eye but has fantastic screening capabilities (see our chart). It effectively screens phone masts, GSM, 2G, 3G, 4G, WiFi, smart meters, cordless phones and baby monitors, and it even looks well set to mitigate 5G. Yes, it is expensive, but with its ten-year warranty, it’s the one I would choose. The film is 1.52 m (5′) wide. Minimum order is 1.52 m x 1.52 m.