This is the Cressi Digi2 Digital Console for Scuba Diving Features: Small Lightweight & Compact Digital Console Provides High Contrast Display Depth Indication w/Range of 0 to 394&'; (0 to 120m) Tank Pressure Indicator from 0 to 4,350 psi (0 to 300 bar) Water Temperature from 14AdegF to 122AdegF (-10AdegC to +50AdegC) Provides Residual Gas Autonomy in Minutes Indicates Gas Reserve of 725 psi (50 bars) Maximum Depth of Last Dive Powered by User Replaceable CR2450 Battery 1000-Hours Use w/Low Battery Warning Indicator Self-Diagnostic Function User Replaceable Silicone Protective Shell Shell Available in Multiple Colors Impact Resistance Design Smart Box: Allows Changing Units of Measure from Imperial to Metric Dimensions: 3.9 x 2" x 1" (9.9cm x 5.2cm x 2.8cm) Weight: 4.3 oz. (122 g) Protective Carry Case for Transport & Storage 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 14AdegF to 122AdegF (-10AdegC to +50AdegC). 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.