Reliable, Complete, Easy to Use The M2 RGBM is a complete dive computer for both recreational and technical dives and is powered by two 1.5 volt AAA alkaline batteries, easily available worldwide.
During the dive:
• Current depth / maximum depth achieved (on request)
• Duration of the dive
• Safety stop
• Remaining no-decompression time at the current depth
• Decompression stop times
• Total ascent time
• Water temperature (on request)
• Speed of ascent (as a percentage of the maximum permitted speed)
• Value for CNS O2 LIMIT % (in the case of Nitrox dives)
• Dive time in minutes and seconds (in bottom time mode)
On the Surface:
• Surface time
• Logbook facility for storing 50 dives in memory
• Profiles of the last 50 dives, at 20 second intervals (max 38 hours)
• Desaturation time display
• Time-to-fly display
• Calendar and clock function
• Air temperature
• Scrolling of no-stop times for planning repetitive dives
• Dive simulator
Alarms:
• No-decompression limit reached
• Rapid ascent
• Omitted decompression stop
• Low battery
• Max permitted depth for the programmed
PPO2 value (for Nitrox dives)
Main Special Functions:
• Setting of Air/Nitrox/Bottom time programs
• Setting of percentage O2 from 21% to 50%, in increments of 1%
• Setting of PPO2 max from 1.2 to 1.6
• History of the total number of dives, the deepest dive logged, the lowest temperature measured underwater, and the total hours of diving
• Display backlight, timed or permanently illuminated (using push-button controls)
• No loss of memory during battery change
• Function for clearing residual nitrogen memory
• Function for disabling audible alarms
• Fresh water / seawater setting (default fresh) | 
