Smart Apnea is very simple and intuitive to use. Managing and accessing all functionality is now a breeze, thanks to new improved software and two control buttons. Instant depth information, dive time, water temperature, descent and ascent speeds, can all be viewed on the display during every dive. Recovery time is always visible while preparing on the surface, a critical function for planning a safe dive. Programmable alarms: (depth, time, recovery, speed, hydration, etc.) Expanded memory capacity stores up to 9 dive sessions; while reading and data sampling every second. The data stored for each individual dive is easy to review, allowing for precise planning of your freedives for recreation, competition, or training. LCD segmented display and scratch- resistant mineral glass provides exceptionally visibility and reading. An advanced-performance microprocessor combined with the latest generation depth sensor, optimize battery consumption. Maximum operating depth 150 m. Specifications Code: 424153 Colors: black-orange, black-grey Max Displayed Depth: 150m Battery Power Indicator: Yes Lithium Battery: Yes Plan Mode: Yes Choice of Metrical/Imperial Units: Yes Fresh and Seawater Settings: Yes Residual Nitrogen Reset: Yes Option to exclude audible alarms: Yes Exclusion of Uncontrolled Ascent: Yes Ascent Rate Indicator: Yes Ascent Rate Digital Indicator (m/min - ft/min):Yes Altitude Adjustment: Yes