The Cressi Digi 2 Digital Console automatically activates when connected to your scuba tank and provides a high contrast display of depth indication with a range of 0 to 394' (0 to 120m), tank pressure indicator from 0 to 4,350 psi (0 to 300 bar) and water temperature from 14?F to 122?F (-10?C to +50?C). The digital console also provides residual gas autonomy in minutes, indicates a gas reserve of 725 psi (50 bars), and maximum depth of last dive. Console is powered by a user replaceable CR2450 battery. The gauge will provide 1000 hours and is equipped with a low battery warning indicator. The Cressi Digi 2 Console has a self-diagnostic function which will check all gauge function prior to use for added safety. Gauge console also is equipped with a user replaceable silicone protective shell that provides impact resistance and comes in multiple colors if you wish to match your gear. The Cressi Digi 2 Console comes with a smart box that allows you to change the units of measure from imperial to metric. Includes an owner's manual.