Oceanic VEO 1.0 Module Scuba Diving Computer Powered by Oceanic's ExclusiveDual Algorithm&trade;- Your choice between Pelagic DSAT (Spencer/Powell data basis) or Pelagic Z+ (Buhlmann ZHL-16C data basis) Air or Single Nitrox Mix to 50% O2 Safety Stop Countdown Timer Water and/or manual activation Single button access to "Last Dive" display (max depth & bottom time)