EFM Cayman Case Armour with D3O Signal Plus - For Samsung Galaxy S21 5G - Black/Space Grey Overview: Samsung Accessories have been excellent in protecting your phone and it's improving everyday with the trend. EFM Cayman Case Armour features D3O with 5G Signal Plus Technology and new antimicrobial properties to make this range one of the slimmest, cleanest, toughest, lightest and most 5G optimised cases in the market. The patented D3O with Signal Plus Technology is the only material to meet the current industry 5G permittivity standard and is proven to limit 5G signal loss by 37 percent compared to any other case material in the market giving your device optimum 5G signal, crystal clear audio and video, faster download speeds, prolonged battery life and best-in-class impact protection. The new Cayman range also uses the latest ion-exchange technology that is proven to kill 99.99 percent of bacteria and prevent further growth and reproduction for the life of the Case.