OVERVIEW 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 market giving your device optimum 5G signal, crystal clear audio...