Block uses 19th-century tech to combat smartphone addiction
Other cell phone equipment | Anti-theft Case for Car Keys Phone Radio Blocking Faraday Box Faraday Cage 20cm x 11cm Black | Sklep Hurtel - Sklep GSM, Akcesoria na tablet i telefon
Why doesn't the metal enclosure of an iPhone act as a Faraday cage? - Quora
SmallRig Pro Mobile Cage for iPhone 12 3074 B&H Photo Video