Oceanic OCL Scuba Watch Dive Computer Powered by Oceanic's Exclusive Dual Algorithm - Your choice between Pelagic DSAT (Spencer/Powell data basis) or Pelagic Z+ (Buhlmann ZHL-16C data basis) Computer Type Stainless Steel Wristwatch Mode Norm (Air/Nitrox), Gauge, Free, Watch Nitrox Mixes 2 (21100%) and Auto Altitude Adjustment Custom Alarms and Algorithm Dual Algorithm