OVERVIEW EFM Cayman 5G Case Armour cover for Apple iPhone 13 Pro is one of our slimmest, cleanest, toughest and lightest case in the market, with built-in antimicrobial properties and integrated with D3O with 5G Signal Plus TechnologyTM. D3Owith Signal Plus TechnologyTM is the only material proven to limit 5G signal loss by 37% - giving you optimum 5G signal, crystal clear audio and video, faster download speeds, prolonged battery life and best in-class impact protection.