Oceanic Atom 3.0 Air Integrated Hoseless Dive Computer Wrist Watch Complete Powered by Oceanic's Exclusive Dual Algorithm allowing you to choose the decompression algorithm basis that best suits your diving needs without compromising safety Wireless Air Integrated Technology allows streamlined and accurate monitoring of tank pressure 4 Operating Modes: WATCH (Alternate Time, Chrono, Daily Alarm, Countdown Timer), NORM (Air and Nitrox), GAUGE (with run timer) and FREE (tracks calculations to allow switching from NORM to Free) Switch betwee