The Mares Mission Puck 3 Dive Computer consists of the Puck computer capsule and a compact easy-to-read pressure gauge with chrome-plated brass body and compass. The shock resistant elastomeric techno polymer case has been designed with optimized angles and shape for maximum ergonomics. The central loop hook, added to the side and frontal soft eyelets, grants flexible attachment points. Mares Puck Series computers feature: RGBM (Reduced Gradient Bubble Model)-algorithm that prevents the formation of micro-bubbles; Air, Nitrox and Bottom Time Special Function Modes; Precautionary Program Settings allow you to adjust your computer for more conservative dive profiles; Easy Access push buttons allow you to operate the computer in all conditions even while wearing thick dive gloves; Superior Display Readability and Powerful Backlight; Easy Convenience User-Replaceable Batteries and Battery Power Indicator; Plan Mode; Choice of Metrical/Imperial Units; Fresh and Seawater Settings; Clear Residual Nitrogen; Exclude Audible Alarms Options; Exclusion of `Uncontrolled Ascent`; Ascent Rate Percent Indicator; Ascent rate digital Indicator; 38 hour Memory Capacity; Includes Watch; Calendar and Temperature Display.