Oceanic Geo 2.0 Wrist Computer, Slate Blue Grey

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 between norm and free). switch between up to 2 nitrox mixes to 100% O2 with no restriction (gas 1 may be up to 100% and may be less or greater than gas 2). stop times less than 3 minutes - displays minutes & seconds, deep stop with countdown timer maybe turned on or off, 2-minute countdown at half your max depth, for dives greater than 80' (25 meters). single button access to "last dive" display (max depth & bottom time), data retention - maintains calculations indefinitely when the battery is changed, audible alarm with flashing LED light, 24 dive on-unit log book and history mode includes total number of dives, max depth, total dive hours, and lowest temp.