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 A specific O2 clean version is available for use with high percentage oxygen gases