Powered by Oceanic"s Exclusive Dual Algorithm® with Deep Stop | Intuitive User Interface with "Step Back" - allows forward and backward navigation through menus and settings * Digital Compass with North, Reference, Auto Home, and Declination Adjustment | Composite Case with Stainless Steel Case Back and Bezel with 500 ft / 150 m depth rating * Switch between up to 3 Nitrox gas mixes to 100% O2 | Air, Nitrox, Gauge, and Free Modes * Gauge Mode with option for Run-Timer on main dive display | Audible Alarms with Flashing LED Light - may be customized or deactivated * User-Replaceable Battery with Data Retention; maintains settings and calculations if the battery is removed | Firmware Update Ready with optional PC Interface Kit - install operational improvements or even future new features