Trust Exa, Smartphone-based head mounted display, Black, 90°, Monochromatic, 5.5 cm, 6.5 cm Trust Exa. Type: Smartphone-based head mounted display, Product colour: Black, Viewing angle: 90°. Minimum screen size: 8.89 cm (3.5"), Maximum screen size: 15.2 cm (6"), Mobile operating systems supported: Android, iOS. Weight: 324 g, Width: 200 mm, Depth: 150 mm