Optional wireless air integration - current cylinder pressure, remaining air time. Integrated tilt-compensated 3D digital compass. Full continuous decompression algorithm. Gas-switching capability. Four dive modes: Air, Nitrox, Freedive, Gauge. Built-in dive planner Detailed graphical logs and dive data on your laptop using Suunto DM4 with Movescount software. Altitude adjustment. Ascent rate monitor/alarm. Ascent time display Up to 199 min. Audible alarm. Dive time in seconds and minutes In free / gauge mode. Full decompression data. Log book memory. Maximum depth alarm. Maximum depth display 150m / 492ft. Profile sampling rates in seconds 1, 2, 5, 10, 20, 30, 60 s. Optional Wireless air integration. O2 % setting Up to 2 gases containing 21-99%. Battery power indicator Low battery warning. Bearing tracking. Cardinal directions. Declination setting. Guided calibration Heading in degrees. Tilt compensated compass. Suunto D6i is the wristop dive computer of choice for those who take their diving seriously. Features like the tilt-compensated 3D compass and wireless air integration make it invaluable in situations where other people rely on your diving skills.