GARMIN Descent MK3i 43mmDISCOVER A DEEPER CONNECTIONFeaturing SubWave™ sonar-based communication and diver monitoring, this advanced, air-integrated1 dive computer and smartwatch comes with Garmin innovations to help prepare you to make the most of your diving experience — plus multisport training and smart features for your active life out of the water.   SUBWAVE SONAR-BASED DIVER MESSAGING (COMING SOON VIA REQUIRED SOFTWARE UPDATE)  UP TO 66 HOURS OF BATTERY LIFE IN DIVE MODE  CHOOSE FROM MULTIPLE DIVE MODES  DIVEVIEW™ COLOR MAPS WITH DEPTH CONTOURS AND DIVE SITES  USE THE DIVE READINESS TOOL TO INFORM YOUR PREPARATION  BUILT-IN LED FLASHLIGHT WORKS ABOVE OR BELOW WATER