The gauge case is made from nickel plated brass The dial window is made of highly shock resistant material (anti-splinter polycarbonate) A specially designed housing protects the gauge and HP hose fitting from accidental damage A large loop area designed into the housing allows for easy attachment. There is an over-pressure capsule fitted in the back of the module to prevent the screen from exploding in the unlikely event of the internal mechanism failing. Dials have a long phosphorescent effect for better reading in poor visibility conditions There are 2 attachment areas integrated into the design for position flexibility This may be a compact design but the displays are vivid and clear - perfect for diving. For example, the depth gauge spreads the first half of the scale and in total shows a range down to 70 m Depth gauge has resettable max depth indicator The compass ratchet bezel is robust and can be rotated with ease even with thick neoprene gloves The numbers and directions on the compass bezel are large and very easy to read The luminous compass dial with a vivid and clear display makes quick work of compass direction even in poor visibility