The new Puck series computer from Mares is perfect for those in need of pure ease. A full function RGBM dive computer with larger digits for easy reading and backlight on demand. The Mares Puck Dive Computer has a single button with easy access to smoothly scroll through the menu options. Features:RGBM (Reduced Gradient Bubble Model)-algorithmFull Function Air/Nitrox Dive ComputerPrecautionary Program SettingsNitrox Programmable (21-50%)Ascent rate indicatorDiver-replaceable batteriesFresh and salt waterPowerful backlightAir/Nitrox/Bottom timer modesNitrogen bar graphAudible alarmsTemperature DisplayAutomatic Altitude AdjustableDEPTH: 492 feetComputer user changeable Imperial/MetricDive Log: 38 hours/50 dives